Why I Finally Said Goodbye to Run-flat Tires on My 2023 BMW X3 M40i

In this video, I explain why I finally said goodbye to run-flat tires on my 2023 BMW X3 M40i. After replacing with regular tires I go over comfort, sound insulation and handling and how it really changed overall feel of the car.
If you are considering BMW X3 M40i and wondering how much it would change your car's behavior this video is definitely a must watch.
Chapters:
0:00 Intro
0:50 Reason 1: Ride comfort
3:52 Reason 2: Price difference run-flats vs regular tires
5:08 Reason 3: Snow driving
6:21 Finally replaced with regular tires
6:53 Discussing ride comfort on regular tires
9:28 Biggest misconception on replacing run-flats
10:48 Freeway driving: sound insulation/comfort
14:07 Driving on twisty roads on regular tires
18:17 Conclusion. Is it worth switching to regular tires

[@ourwedding09242011]

Such a nice video that covers all the details and and clarifies questions about flat tires in general👍 It’s definitely such a right choice to change them.

[@100miledrive]

Thanks for your feedback. Yes it certainly helped and car feels much better now

[@miata1370]

Your review mirrors our experience with our 2023 x3 M40i. We chose to order our BMW with the o.e. 19" 245-50-19" tires. Those were also runflat tires. With only 5k miles on those Pirelli P Zero All Season Run Flats, we recently changed those to a non-runflat, all season tire. While I considered the Michelin Pilot Sport All Season 4 tires you chose, we opted for the better winter performing Michelin Cross Climate 2 tires. Living in the MidWest US, I placed a higher priority on winter driving than on the MPS All Season 4 tires (which btw, I have and like very much on another vehicle - it is a great tire). Like your experience, non run flats provide a smoother riding experience, are lighter tires and much less expensive. We purchased our x3 M40i but if you've leased your BMW, remember, at lease turn-in BMW, will expect it to be returned with o.e. spec run flat tires with acceptable tread depth. Unlikely you will get 36k miles from a set of run flats so you'll get "bit" with an expensive tire replacement charge at lease turn-in time. So...even if leasing, consider the ride improvement of switching to non run flats now..and save those o.e. runflats for lease turn in!

[@100miledrive]

thanks for sharing. Yep absolutely. I am still debating whether I will keep this car or trade in for something else, but if I am returning it back I will be putting those original tires back. Run flats wear out also very quickly and paying $2,000 at the end of the lease, plus a disposition fee is not pleasant at all. Love Michelin tires on this car. My wife finally started liking the ride as it became way more comfy. Wish you all the best with your BMW. I think and hope they became much more reliable to keep long term.

[@ince9507]

Thanks man, i have a 5 series and I’m gonna change it to normal tires . Very good video 👏

[@100miledrive]

Thanks for stopping by. Make sure to watch a video I made on 540i on the channel. I did discuss Run-flats on the 5 series. X3 M40i has firmer crossover platform and run-flats feel far different here.

[@MrTONYTONYM]

My G11 750 came with P-zero runflat 245/35/21 Front and 275/30/21Rear. Rode like a dump truck anytime the road is not glassy smooth. Hitting some minor bumps the car's suspension just gave up completely. Replaced it with Contisportcontact non-runflat, OMG what a night and day difference! Steering no longer tramlines with road crown amd bumps, and the ride improved 50%. I have now since replaced the wheels & tires with 19 inch non-staggered set up, a further improvement.

[@100miledrive]

Thanks for the feedback. 21 inch wheels, run-flats and M suspension is a recipe for disaster. I can't believe BMW doesn't care about driving experience and more thinks about their customers getting a flat tire and not have to be stuck on the road replacing it. Well most people never have a flat tire in their 3 year lease experience, yet they feel the harshness of run-flats every second they drive the car.

[@overload-58]

cool video man! i have a 2022 and it came with the bridgestone alenza run flats as well. i have about 20k miles on them, and i have been eyeing the michelin PS4 all season based on recommendations from friends and the forums. i think the ride is more comfortable with the PS4s than the alenza run flats, especially over bumps. noticed it almost instantly as soon as i rode in a friend’s X3 with them PS4s on! i’ll definitely get them! good review on the tires overrall

[@100miledrive]

Thank you for the feedback. Yes an immediate thing you will notice is it will absorb the bumps nicer than with Bridgestone Alenza. Those run-flats are very harsh for this car. I am certainly happy with Michelin PS4 A/S. Many stated in forums handling would be impacted. That would only be in very harsh cornering, otherwise PS4s are very good tires for X3 M40i. I am supper happy.

[@johnreis1464]

Great review and just what I was looking for. To tame engine noise, have you ever tried the utilized the reduced engine sound selection from general menu? I would prefer the B58 engine with minimal exhaust sound closer to the x3 30i? I would probably use sport individual with all settings on comfort to bypass the stop/start.

[@100miledrive]

Thanks for the feedback. Yes I did try reduced engine sound setting offered in the menu. In EcoPro and Comfort mode it is probably reducing the engine sound but the difference is hardly noticeable. In Sport mode with Sport settings it does reduce the engine sound, it makes it sound like in regular comfort mode and removes all the crackles/pops. Usually in Sport mode with normal settings engine gets louder and deeper but with Reduced engine sound it sounds like in Comfort mode. In my case my wife had concerns about the engine sound, so when we are driving together I put the car in EcoPro mode and she is fine with it. For me stop/start is fine as it's more seamless than before due to mild hybrid system. Overall if you don't floor it hard it sounds slightly louder than X3 30i but very manageable. In 2022 they reduced engine sound compare to original X3 M40i. Hope this helps. As always I recommend to rent 1 for a day and try it out if you can. More than the engine sound Suspension is what you should be OK with as it feels noticeably firmer than X3 30i especially at lower speeds.

[@TheOriginalKendo]

Thank you for the info

[@100miledrive]

Thank you for the feedback and stopping by. Will have more videos on X3 M40i

[@travelwithjustin]

Good review. I'm at 10k miles with the winter wheel and tire set (Bridgestone runflat) on my '22 M40i, and I will say runflat ride quality has advanced significantly since my '07 335i days, where I got rid of those runflats almost immediately... but also the suspension on this M40i is just so good. I don't want these Bridgestones for winter (much prefer the Michelin winters I have on my M235), so I'm doing all I can to use them up (going to take a while, I don't drive much), at which point I'll finally install the 20" summer wheels and tires that I originally ordered with the car. I believe they are Yokohamas, maybe I will try to sell them and get the Michelin pilots I prefer for summer. Good to know that there is a noticeable difference in ride quality with our suspension, but either way, I don't have any real complaints with the current setup, again the X3 suspension is just so good, especially given how absolutely terrible our roads are in Seattle. Maybe I'm just used to the M235 where the ride is harsh enough to knock your fillings out, on non runflats. And that ride is soft compared to the 335i that it replaced.

[@100miledrive]

Thanks for the feedback. I did watch some videos about new gen of run-flats which feel almost as good as regular tires and they are thinner, but I don't think BMW using them yet. Maybe winter run-flats in cold conditions don't feel that jittery.

[@plusforce]

Very informative. Thanks! Regardless of the tires, do you hear some kind of wind noise from windows at speeds above 50 mph?

[@100miledrive]

Hi there. Wind noise is pretty normal. I would say didn't feel any different than driving a regular sedan. In cars like Jeep Wrangler is where you really hear a wind noise :)

[@davidleung1049]

Nice video. Very good explanation. I have a 2023 x3 s30i. Do you think there is any noticeable ride comfort difference replacing the run flat tires with all season tires? I am just a regular everyday driver.

[@100miledrive]

Thank you for the feedback. It all depends if you have any issues with the ride quality. X3 30i has more comfortable suspension and it's suspension might be fine enough to handle run-flats. If you don't experience jittery ride then should be OK. You will certainly see improvements with regular tires but it's up to you whether you want to go this route. If you are keeping this X3 I would consider it long term. -Also I made videos on this channel about BMW 430i convertible and BMW 540i both having run-flats and they were fairly comfortable, so suspension makes a huge difference.

[@rembo183]

@@100miledrive - I had a ‘22 230i with run flats and it was a comfortable ride. Of course I did not have the stiff suspension with the MSport package.

[@100miledrive]

@@rembo183 Yes, with regular trips same as X3 30i with run-flats it feels total normal. A bit more road noise but it's certainly acceptable. The best scenario I saw in BMW 540i M Sport trip where they used Run-flats on 20 inch wheels, so those tires were low profile 35 and the ride was still super comfortable, to the point I was quite impressed. I do have that video on the channel. So the issue is only with firm suspension like X3 M40i where you see run-flats really ruining the experience.

[@rembo183]

@@100miledrive - Yes that’s a good point on the 540i with M Sport. My X3 x drive 30i with the M Sport option with 20” wheels and run flats feels great. Of course on bad roads it’s a bit jittery but ok overall. I like this X3 and after research I would NOT buy the M40i. No need to mess with perfection; it a daily driver! Not for the track or speed in canyons. As a senior, I like a comfortable ride with a luxury refined feeling. This X3 meets that need. It’s a better overall experience than the 2022 230i coupe.(that was a great ride but a bit too low and less roomy than the X3.)

[@Whit11]

3 blowouts in as many years on potholes… I’m finished with run flats ( and yes, I maintain proper tire pressure).

[@100miledrive]

Thanks for sharing. Yeah run-flat tires have many flaws that not talked about and they are so much more expensive

[@Lionsgate_888]

I just replaced my bmw x3 RFTs with Continental Extreme Contact DSW 06 Plus. The ride is amazing, as I expected. Every new vehicle I’ve purchased over the past 15 years, I drove to Discount Tire the next day and put Continentals on it. Cannot match the ride as well as amazing handling. I’ve even taken off new Michelins and still got a better ride.

[@100miledrive]

Thanks for the feedback. I've heard about: Continental Extreme Contact DSW 06 Plus on BMW forums quite a bit, but for some reason I didn't have good experience with Continentals on my VW CC so I decided not to risk it and go with Michelin. But I see more that Continentals are more favorable on BMWs. I will consider this tire next for sure as I do find lots of positive reviews especially on BMWs.

[@ift7628]

Great video, doing away w RF makes a huge difference! Another thing that drives me nuts (in an otherwise absolutely stunning X3M40 vehicle, which I am really happy with overall!!!) is how uncomfortable the basic Sensatec seat is...I have had 3 BMW before and the seats were absolutely comfortable on all....this one is a puzzler... Any advice, experience, modifying or customizing these seats? The Bimmerfest is full of stories how uncomfortable these are (ventilated are supposedly are worse)....I wonder if you could customize the seat with cushions from 5-series or X5, that are absolutelly superb... Would be willing to pay decent money for such an upgrade

[@100miledrive]

Thanks for sharing your feedback. Yep 100% agree on the seats. I recently recorded another video where I talked about 4 problems on this car and seats was one of them. They have so much nicer Sensafin seats in X5, I don't know why they messed up in X3. It already has firmer suspension, having better cushioned seats would give a better more premium experience. I haven't yet thought of any options on upgrading the seats. Mine is a lease, I am not sure whether I will be keeping the car. Also I was hoping they would break-in after about 10K miles, but that is not the case, still feel firm and overall not quite comfortable.

[@travelwithjustin]

This is interesting if they are using different Sensatec on different models, I had no idea. I don't think they are too bad, but definitely not as comfortable as leather. I would agree that it might be more the cushioning itself than the seat material.

[@alexi007x3]

I just upgraded to the 787M wheels with Michelin PS 4 AS tires for my M40i like yours, from the 887M 19's with RFT's and I am just blown away at how much better the ride is now. Everything about the ride is way better; less, noise, better directional stability, much improved cornering, a more confident steering feel, and bump absorption is excellent! In my opinion, any M car is better with a staggered setup, it's just engineered that way. A squared setup is convenient with tire rotation, but other than that the general feel of the car is way too bland and lacks the performance edge. After making the switch recently to staggered 20's with non RFT tires, with Michelin UHP's, I absolutely see the difference, it is night & day! Also, believe it or not, the 19's were 50's on all corners and this new setup is 45's F and 40's R and the ride now is actually way better. This alone should tell you how bad RFT tires are when it comes to comfort when you need it. Even in Sport Mode, it still feels better to me now, compared to what I had. Thanks for sharing, it helped me make the right decision!!

[@100miledrive]

Thanks a lot for sharing your feedback and kind words. Yep, regular tires make a huge difference for this car. Also agree on staggered wheels/tires. They really help grip better and give more confidence. I drove BMW 4 series convertible on the twisty roads with 225 regular front and rear and was quite disappointed that suspension was capable of a lot more but tires showed a limit very quickly. Staggered tires really make a huge difference.

[@joreno4419]

Hi, did you notice a difference in fuel consumption while using run flat v/s regular tires ?

[@100miledrive]

Not really. I did read in forums that some people have noticed a difference after switching to regular tires. There probably is but it's not very significant. I will keep an eye more. I drive this car lately in Sport mode just to hear louder engine sound.

[@rembo183]

I think the jittery ride is caused by M suspension. Your video suggest that because you noted that after switching to regular tires you still had the jittery feel. I’d say best ride is rhe X30i. Maybe try an X30i for more comfort.

[@100miledrive]

Thanks for your feedback. BMW X3 M40i has firmer suspension than X3 30i but run-flat tires make the road contact very harsh. With regular tires the road contact became so much better. It's just in lower speeds ride quality could be better, and that is due to Adaptive Suspension. But the biggest thing in this car is it's engine. It makes car a different animal. Like it has more life in it. It's very noticeable when you drive them back to back. I recently went to BMW Ultimate Drive event and again drove X3 30i there. I will be posting that video soon. Anyway for most people yes X3 30 is a way to go. However I do not regret getting X3 M40i as I love to see a distinct BMW character in it. I just think BMW could do even a better job with it to cater to more people. (Will make a video soon on what I expect to see in upcoming X3 M50i)

[@Fit4Life921]

have you taken this in the snow yet? what's the issue with the run-flats in the snow? tread is too sporty and firm for colder weather?

[@100miledrive]

I haven’t taken this car in the snow yet. Run-flats that it came with are summer tires which I would not recommend to use is snowy conditions.

[@absabs3168]

And how/which way to prevent/reduce the inconvenience and discomfort of flat tyres/replacing the flat tyre especially when on hurry, under rain, cold winter etc...?

[@100miledrive]

I think it's a choice. If you OK with jittery ride, and let's be honest many people are not bothered by that then you can stick with run-flats. But the reality is that since this car has short travel suspension run-flats really ruin it's driving experience and in my opinion having a good driving experience by putting regular tires is far greater than worrying about a run-flat that may not even happen in years to come. Brands like Porsche do not use run-flats at all in any of their cars with this exact same reason - they want to ensure driving experience is not compromised by tires. They just offer tire sealant for quick repair if it's possible.

[@Hargak]

Would be cool for a carbon fiber roof to replace the moonroof, Might help the top-heavy feel by quite a bit.

[@100miledrive]

hmm interesting. I think at this price point they will not bother with that :)

[@Hargak]

@@100miledriveOf course, but an aftermarket option (or CS) would be nice.

[@bmw12347]

Will the tyre pressure monitor system still work? Anything you need to do to it?

[@100miledrive]

Yes Tire Pressure monitoring system works exactly the same way, didn’t need to do anything at all.

[@anonymousdevildog1406]

I just bought a BMW M550 (2023) and BEFORE 6K miles I already got a bubble. OF COURSE the stealership had no warranty on them. I'm ditching them this week for Goodyear Exhilerate tires.

[@100miledrive]

Thanks for sharing. This brings a good point of seeing lots of issues with run-flat tires that are not very common with regular tires. I've heard cases where they can even break because of hard side walls. Putting regular tires will be a relief for you and your car with a much more comfortable ride.

[@scotta5766]

Do you think that eliminating run flats is sufficient or would you also stay away from 21 or 20 inch wheels too?

[@100miledrive]

I have 20s on mine. I wouldnt’t get 21s mainly because you get more fragile wheel/tire combo. In my X3 i can hit pot holes no problem. With 21s you will be more cautious as pot holes will feel harsher and there is a risk of blowing a tire or breaking a wheel. In both cases using regular tires will make a difference. 19s will feel wvwn more comfy, but I think 20s are OK too. They certainly look nicer.

[@miata1370]

We ordered the o.e. 19" wheels/run flat tires on our 2023 x3 M40 for several reasons: Ride quality, "square tire" setup allowing for full tire rotations, and lower tire replacement costs. That said, ditched the o.e. Pirelli P Zero runflats for the improved ride quality and better winter driving performance. We switched to Michelin Cross Climate 2 tires in the o.e. size.

[@Egytrades]

Could you please tell us the exact tires. I have the same car

[@100miledrive]

These are Michelin Pilot Sport 4 All Season tires. You can find in most local tire shops. Just ensure you are getting the right size: www.tirerack.com/tires/michelin-pilot-sport-all-season-4

[@noblefonz]

Does switching tires affect getting maintenance done at the dealer?

[@100miledrive]

No not really. Most techs who I discussed this at BMW were 100% for it. It improves the ride comfort but doesn’t affect anything related to the drivetrain.

[@your_royal_highness]

I hate run flats, BUT what happens when you get a flat? I think the expense has to be considerable. I guess i have to take that into account in pricing

[@100miledrive]

Essentially it's a choice between having run-flats and feel like you are protected in some way (although there are many comments from car owners indicating that run-flat tires have tendency to break in which cases a new tire would need to be purchased) and also feel the harshness of these tires every second you are driving a vehicle. With softer suspension run-flats work OK, not that bad compare to firmer cars. On the other hand with regular tires you may not have a flat whatsoever or if you do occasionally get one then a self-healing kit + spare tire. I prefer regular tires as I want to enjoy more comfortable ride.

[@nissy4]

I want to go 20 inch not staggerd set non rft s no run 21. S or just find some 2 wheels 21 stock for the front en run 275 35 21 allaround

[@100miledrive]

Basically if you are not in to cornering then non staggered wheels are fine. I personally like wider wheels in the rear it certainly helps in better corneting, it even helps in wet weather, but I would say most people don’t need staggered. 20s and 21s look good on this car

[@jorgevillacis8127]

how much pressure (PSI) you put to the tires ?

[@100miledrive]

I have 20" tires and my front should be 36 and rear 41. I keep front around 32-33 and rear around 36-37 for regular tires. This setting is also recommended in cold temperatures but I do this as it feels slightly less bouncy and feels good with regular non run-flat tires.

[@thedanwriter1]

Is there any difference in gas mileage you noticed?

[@100miledrive]

Hard to say. But I believe it is slightly better. Overall I am very pleased with high fuel efficient this engine paired with mild hybrid system. In EcoPro mode in traffic condition this car is more fuel efficient than my VW CC with 4 cylinder turbo engine.

[@Snaproll47518]

I’m not a fan of RFT. I paid $250 extra for a spare on my my 2023. If I have to replace the tires before selling the car I’ll go for Perrelli.

[@100miledrive]

I hear many people talk about Pirelli tires for this car. Do you think they would suit this X3 M40i better than Michelin Pilot Sport? Are they more comfortable or offer better performance? I still haven't gotten my spare tire. Mos likely will order one soon.

[@Snaproll47518]

@@100miledrive I had a 2018 X3 (2-liter with M sport package) that I put Pirelli all season tires on at 20K miles. I thought the ride was quieter and smoother with Pirelli. . I can't say how the Pirelli tires compare with Michelin but would be interested to know if someone else knows. My 2018 was flawless. It had one recall for the inlet flap actuators and new tires. I traded it in at 50k miles for a 2023 X3 M40 that is a blast to drive.

[@100miledrive]

@@Snaproll47518 nice. Thanks for sharing. Enjoy your X3 M40i. B58 engine is legendary in it and it’s fairly fuel efficient

[@JayeBass]

you cant go to an entirely different tire brand and compare. It's not the same thing. You need a tire of similar spec by the same brand to make a real comparison. Michelin is the best so of course it would be better than what was on there lol. But glad you've found a tire that makes you happy brotha

[@100miledrive]

Thanks for the comment. Well if I was reviewing tires solely I would do smth like this, but since it is my own vehicle and I chose a tire based on many recommendations from BMW owners, therefore it was a logical thing to do - to spend money on something that is the best. Either way run-flat tires are still harsher because of reinforced side walls. Another point I was trying to make is that this car has Adaptive M suspension which is already firm and combining that with run-flat tires creates a bad jittery experience. I test drove BMW 540i, 430i convertible and X5 with run-flats and those were fine with run-flats.

[@JayeBass]

Maybe some cars are more sensitive to the run flats. That could definitely be the issue.@@100miledrive

[@100miledrive]

@@JayeBass Basically cars with shorter travel suspension or firm cars would be more sensitive. There are Gen3 run-flat tires that ultimately solved this problem, but they are not massively out yet.

[@akbarbukhari]

where do u buy that donut kit?

[@100miledrive]

1 way is to get through your local dealer or you can find one online. I still haven’t even bought their self sealing kit.

[@rembo183]

Sounds like you should get an X30i ! Better ride overall. No need for more power and a better ride? I have the X30 I and have no need for more power. Why spend more than not like the ride?

[@drumsac3004]

I test drove a 30i and hated it. I have an m40i now and it’s night and day better. The throttle response is laggy on the 30i, the engine doesn’t sound great and the brakes are mush with the non msport brakes. The b58 is amazing.

[@JadeaRS4]

Overall run flats are great. Blow 1 regular tire and destroy a rim at the same time. Then it's all 4 tires you have to replace. All just to save a bit of ride quality and 500$. A win win scenario is runflats. Very obvious. All seasons are horrible. You can get winter or all season run flats. Need more experience in life I think.

[@100miledrive]

Thanks for your feedback. I just made another video on run-flats as I drove more cars on my channel. In that video I discuss in more details where I found run-flats to be more acceptable and where not. As far as blowing a tire, let me tell you that run-flat tire is a lot easier to break as a tire than regular tire. When it rains and we get more pot holes run-flat will literally break upon the impact and destroy a rim. My cousin replaced 2 tires and 2 wheels this winter on his BMW 7 series and there are many stories like this.

[@alfredotando3392]

sir I'm going to ask question, can I put regular tire to my run flat rims?

[@100miledrive]

Hi there. Sorry didn't quite understand your question. Are you trying to replace run-flat tire on just 1 wheel with a regular tire?

[@alfredotando3392]

@100miledrive no I'm going to change my 4 run flat tire with regular tire and install it in my run flat rims...is it possible?

[@100miledrive]

@@alfredotando3392 Yes, this is what I did. Your rims can take any tire for the most part. Depending on what car you have you can check with local tire shop or tirerack.com or read forums on what best tires for your car.

[@alfredotando3392]

@@100miledrive thank you so much.

[@hollywood8997]

You blow your tire, you wait for towing! I will go for RFT🤣

[@newyorkerik]

And whats your tyre pressure mate😊

[@100miledrive]

I keep tire pressure about 1-2 PSI below the recommended. Front around 34-35 and Rear 39-40. This is for 20 inch wheels that I have. So far super happy with regular all-season Michelin tires. There are some other good brands that I heard in this comment section and in many other BMW forums.

[@newyorkerik]

@@100miledrive Sounds good I have the same vehicle I'll be at a 2020 and I do have the same problem right now I'm running run flats with driving me crazy but my listed PSI is 32 and 36 and rear I also do one below. Thanks mate

[@sokratzmmf]

Run flat tires are the worst! Had to replace so many on my m340i

[@100miledrive]

Thanks for sharing. What was the reason for replacing them?

[@PlayMusic91]

And, when you've got a puncture , how do you fix it ? Is no any spare wheel on X3 ...

[@100miledrive]

If you go with regular tires you can either buy an air compressor kit. Porsche does this, Tesla doesn’t give anything at all. Or you can buy a donut tire for any long trips. The thing is you many never have a tire puncture in your let’s say 5 year ownership, but you will feel the harshness of the run-flats every time you drive X3 M40i.

[@PlayMusic91]

@@100miledrive I own a X3 M40d with run flat tyres and I don't feel any harshness 🙂

[@100miledrive]

@@PlayMusic91 It could be that you are very comfortable with this type of the ride. Run-Flat tires have very familiar signature regardless of what car you put them on. It's a harsh rubber that you can feel on the bumps. If you switch out run-flats for the regular ones you will immediately see the difference. With firmer suspension of X3 M40i it is more noticeable. There are 3rd gen run-flats that are very close to the regular tires, but I don't know when BMW would switch to them.

[@Edsheahan]

Putting Michelins on as we speak !!!!! EFF THESE RUN FLATS

[@Edsheahan]

$1180 for the set of Michelin’s

[@Edsheahan]

2019 440i coupe xd btw*

[@100miledrive]

:) thanks for stopping by. Just make sure to have some type of tire sealant kit. A piece of mind.

[@rileyhance318]

id rather deal with slime or seal sealing tires than run flats

[@100miledrive]

yep totally agree. I am still yet to buy slime and self sealing kit for my car.

[@sprsk]

Nice video. Saying in general, change the run flat it's not correct. What tires did you had (specific) and what tires did you try (specific). There are big deferences between tires manifacurers and tires models. I have mine ROF on. I'm on Summer tires, ultra performance with front 225/45R18 and 255/40R18 back. Almost no deference. I have driven the same car without ROF. Also, i believe its not correct to use 4 season tires for just 2-3-5% use in winter. Just a friendly proposal for you kzbin.info/www/bejne/qYW1n2R7Ztp5bMU

[@100miledrive]

Thanks for your comment. Thanks for sharing that video. I did watch that previously and in fact next week will release a video which I already shot where I will give some updates on run-flat tires. While there are many other RFT options out there including Gen 4 RFT - this is not what BMW does with X3 m40i. When you are buying X3 M40i of the lot - it comes with Bridgestone Alenza RFT and those are very harsh tires for this car. Yes, you can buy other brands but imagine having to spend more money on another RFT set. I've read many BMW forums and had discussions with other BMW owners and settled on Michelin A/S and avoiding RFT completely. One thing they haven't figured out is thread life. RFTs wear out much faster. Yes, summer tires would be a better match than all-season but like I said I do want to be able to take my car to snow occasionally which I did.

[@sprsk]

@@100miledrive In my Area (europe) mine F36 - 425D had the Goodyear F1 asymmetric 3. Almost can't find any deference with normal tires. Tell you the trouth, i believe are more responcive on tight or long fast corners. Cant wait for the next video, cheers.

[@jackf.7415]

RFT’s are a huge advancement in the automobile industry and, of course, BMW is blazing the trail with this innovative technology. To start with, BMW OEM tires, Continental or Bridgestone’s, after a flat/puncture, are good for 150 miles, not 50 miles. What is your engineering background and can you point to any statistical analysis to back up your assessment of RFT’s?

[@100miledrive]

Thank you for your feedback. In my recent review, I approached the topic from a consumer standpoint, sharing my firsthand experience with Run-Flat on my X3 M40i equipped with adaptive M suspension, highlighting how it detracts from the driving pleasure. Following up on this, I've released an updated video focusing on RFTs after testing the 2024 BMW X3 30i, where I briefly discussed my experience with RFTs after driving several BMWs on the channel as well as the latest generation 4 RFTs. While the concept behind RFTs is commendable, aiming to provide added safety and convenience in the event of a flat tire, my experience with the stiff ride quality of my X3 M40i was far from ideal. Sacrificing comfort for the potential rare occurrence of a flat tire seemed disproportionate and compromised the overall driving experience.

[@ericsrisavaththay2503]

So you need to ask him what his engineering background is when he is only sharing his viewpoint as a consumer? Did this look like a scientific video to you? Cant have an opinion unless you are an engineer? Lol...for your information, alot of consumers feel the same way about Run Flats as this guy does. You dont need an engineering degree to feel the difference. Run flats offer piece of mind in case of a flat but rides harsher due to the stiffer sidewalls, but regular tires ride nicer but you will be standed in the small chanve you will get a flat and dont have a spare. Dont need an engineering degree to see that its about compromise.

[@jackf.7415]

@@100miledrive Thanks your for the response. I initially may have viewed your opinion as being supercritical of BMW for even the idea of using RFT’s. I get it. My 2013 335i came equipped with Continental RFT’s. Although I thought the concept was very cool, I did not like the ride, lots of road feel and overall bad driving experience. Ride comfort was missing when comparing the 13 335i to my my previous ride, a 2010 328i. Looking at the specs on Continental ‘s, I found that, when punctured, the tire could be driven up to 150 miles. To get to the 150 mile mark stiffer tire side wall construction was required to meet that distance requirement. Unfortunately, ride comfort was out the window. I ditched the Continental’s for Bridgestone DriveGuard’s. The DriveGuard’s only had a 50 mile range post puncture and, overall, a far more comfortable ride with a higher mileage rating. Now driving a 2018 540i with OEM Pirelli tires. The Pirelli’s also have a 50 mile post puncture driving range and, IMHO, provide a more smoother comfortable ride then the Bridgestone DG’s. I believe, in part due to auto manufacturing bettering suspension tuning to work with RFT technology. Any BMW M variant is going to have a stiffer ride. To get a more comfortable ride on your X5 Consider switching to an RFT wheel/tire combination that provides a softer, smoother ride. It may not give you the level of performance to match the capabilities of your X5. Going to be a trade-off between comfort or performance.

[@ravenmoto310]

Run flats cost more, they are heavier and give a harsh ride. Manufacturers need to go back to regular tires and a spare!

[@100miledrive]

100% agreed. I don't understand why run-flats are being pushed so hard by many manufacturers. They thought it would create an experience where you don't have to wait for a tow truck or get hands dirty, but in reality it affects driving experience greatly and that is far more important. Plus all the issues with run flat tires breaking, being heavier, more expensive etc...

[@ravenmoto5948]

​​@@100miledriveGlad you mentioned the breaking. If you ever look at a car fax on a used vehicle with run flats all you see is 1 tire replaced. Its constant througout the car fax 1 tire replaced and you arent really suppose to replace just 1 tire on an AWD vehicle!

[@100miledrive]

@@ravenmoto5948 Hmm interesting. Yeah I saw some videos on KZbin people showing how run-flat tire can break by hitting pot holes.

[@mtownrudeboi]

​@100miledrive I can attest to that. I hit a pothole about 2 weeks ago and my rf broke along the seam of the rim. Drove about 15 miles home doing about 55 with no issues. Hate the cost but that piece of mind is worth it. I have a 2022 BMW M550i.

[@ravenmoto5948]

​@@mtownrudeboiSwitching to good non run flat will save you 5lbs plus per tire! That's 20 lbs of unsprung weight taken off, 5lb per wheel that's huge!

[@janisvanags3196]

Trasferbox!!!!

[@100miledrive]

did you mean transfer case?

[@ernestogalvan143]

Why the lease? Why rent for so long. Lousy return for money. Low payment but you get nothing on the end , like renting a house

[@100miledrive]

Thanks for the comment. Let me give you a full perspective on the lease: 1. In the lease you are paying taxes only on the payment you are making. And here are the benefits: a). Car is totaled within let's say 2nd year of the lease. Insurance pays it off and you paid taxes only based on roughly 50% of the car. So you paid less in taxes. In case of a purchase tax is added on the full amount of the car. So your higher monthly payment includes higher taxes. So in case of the loss you basically paid more out of pocket than in the lease. b). Let's say after 3 years smth happened in the family, you got a kid, you decided you need a bigger car - in case of the lease you can just exit or trade in and again you paid taxes only on the time you used the car for. In case of a purchase you will have negative equity after about 3 years in case you want to trade in because taxes were added to your loan based on MSRP of the car, so it makes sense to keep the car for the full duration of the loan. c) If a car was in accident and repaired by insurance, well if you financed it now your car depreciated because of the accident in the record and if you want to trade-in/sell you will have to absorb it's lower evaluation which can be very significant. In case of a lease you can just walk away from this car after the lease end and owe nothing 2. Dealers are more motivated for the lease especially now and can give you a discount in hopes you will return the car back to them and they can mark it up ad make extra $$$$, but obviously you don't have to return if you want to keep it, unless it's Tesla. So I was able to negotiate a higher discount on this X3 M40i. In case of the finance they are not as motivated since you are keeping the car. 3. In the past you could also negotiate residual value after lease, but this option kind of no longer exist as dealers want to get cars back after lease. Other perks include: You can still purchase your car after 3 years of the lease, however a downside would be you will just pay some dealer fees and maybe slightly higher interest rate on the used car loan, but here you can figure out with so many banks and good credit So after all lease is not that bad. It gives you a piece of mind leasing a car with a lower payment and keep your options open. Now if you are 100% sure you want to keep your cars then go for the finance. Sorry for such a long response :)

[@ernestogalvan143]

@@100miledrive not sure what you mean about taxes. We have a purchase tax when we register our car first time 4.5%. No tax after that. You’ve mentioned no other benefits, just loss. Sorry.

[@100miledrive]

@@ernestogalvan143 Not sure what you mean by 4.5% tax.If you are purchasing/financing a car your Sales tax is added into the car's purchase price based on MSRP. If you are leasing you only pay taxes on each payment that you are making. Sorry I couldnt make it clear for you enough, but what I listed are real benefits of leasing. I am glad purchase works in your case. If lease was not a viable option it would not be as popular including for tax purposes.

[@ernestogalvan143]

Sorry I could explain how sales tax work. Leasing doesn’t seem to be a smart idea. Never have equity or truly own anything. Seem like a poser.

[@100miledrive]

@@ernestogalvan143 OK, here is the thing even if you finance - your car is still at it's highest depreciation for the first 3 years. So you are still going to be in the negative regardless of leasing or purchasing. After 3 years you will start building equity in your finance. Guess what this is why in the lease auto makers want the car back because now steep depreciated is over and they can resell the car again. And you can still purchase your car after 3 year lease. Also regular/luxury cars depreciate down to 0 eventually. Only exotic cars hold their depreciation well after first 3 years. I am also not saying lease if for every one but I totally disagree with the way you looking at the lease.

[@donaldbanner2185]

.................................... NOW loose the Check Your Engine Light ..NIGHTMARE!

[@100miledrive]

Sorry, didn't quite understand. You have Check Engine Light on your car? If you could share more about this

[@n.prince2458]

This video is sad. There seems to be no car enthusiast, here. The major issue with the x3 M40i is the springs. Replace stock springs with "MSS" springs. You can get the softest ones. You also had the wrong Run-flat tires. Replace stock tires with Michelin Primacy 4 and up or Continental's Run-Flats. Run-Flats are the highest protection under the Sun. Fix a Flats and spares deal with the aftermath...only if you're still alive after a blowout. In life, sometimes, there are no second chances. Road hazzards can be very unforgiving. To lead people away from that, sounds very irresponsible and it sounds legallly actionable. I would do some serious research before misleading people. It can leave you liable to serious damages. You simply had the wrong spring and tire combination. Not all Run-Flats are equal...as the title of this video implies.

[@100miledrive]

Thanks for your feedback. This is my personal opinion and I do stand by the fact that regular tires are much better than run-flats and suit X3 M40i more because of firmer suspension. Now since it is a leased vehicle I do not have any intention to mod it as I am not sure whether I am going to keep it or not. Also look up KZbin videos and read some comments under this video of people who had even worse issues with run-flat tires. They break in patches and even more dangerous in situations when you hit a pothole. Happened to my cousin in 7 series where run-flat tire just broke from the side in rain. So to say run-flats are much safer is a very debatable argument, yes they help with flats but because of their heavier construction and reinforced side walls they are prone to breakups during harsh impacts. Also brands like Porsche would not put run-flats on their cars for the reason of ruining driver experience. BMW in their EVs also does not use run-flats at all - again for the same reason not to ruin driving experience.

[@n.prince2458]

@@100miledrive Chunks? Interesting.... Saying Run-Flats leaves out too many varibles. Summer Run- Flats, Winter -Run Flats, All Season - Run Flats, etc. All different compounds. Compound technology is overlooked. If you are running the wrong compound in the wrong season, you will get chunks. Most people do not know what they are doing. Pirelli P- Zero and Michelin 4S are amonf the worse ones for comfort. Those are not SUV intended tires. Those are sport car intended with a different weight class. People can't do everything upside down and expect good results. Those are more stiff suspension track focused sports cars. I have an x3 inline 6. I dont have those issues. The Michelin Primacy gets more supple riding with every new release. The Conitinentals are always superb. Leasing? Sounds like you will be an x30i customer. Regarless wich SUV you will settle for, you will be doing yourself a tremendous disservice not to try the MSS springs or check out the reviews. They have stock height. You can always sell them. Folks will gladly take them off your hands

[@zoner__]

So we listened to 18 min of subjective opinion. How about using some instruments to measure the oscillation of the car with different tires. Or even a simple decibel meter to gauge the difference in noise levels. This could have been a 3 minute video.

[@100miledrive]

Thanks for your feedback. Yes while this was a subjective opinion I was providing my feedback not just based on the noise level but overall giving a real world feedback on what it’s like driving this car on the run flats and then on regular tires. I do have DB meter that I use in my dynamic drives, but here was more of a drive feel feedback. Anyway thanks for stopping by.

[@ChristianLundin-zq3lv]

Hello! Interesting test of yours! (Google translat) For me, it is completely illogical how someone can choose a sports SUV with all that it implies in terms of driving pleasure and sportiness and then deteriorate the characteristics with worse tires such as Michelin All Season, worse safety, longer braking distance, easier aquaplaning, worse steering feel and much less sporty. Bmw engineers have put thousands of hours into testing to find the balance between sport and comfort and safety! Better in that case to choose quality summer tires without runflat or go down in inch size to 20 or 19 inches still with quality summer tires for more comfort and a little less sportiness but still BMW feel. Google All Season tire tests versus real summer tires and you will see the difference in safety where summer tires are by far the best at everything. If you happen to find yourself in a panic situation, the tires are the difference between whether or not you will crash or skid off the road. Always choose the best tires and drive carefully!

[@100miledrive]

Hi there. Thanks for your explanation. Here are the few things I would like to explain about 2023 BMW X3 M40i. First is the question: do you have one or had one in the past? As I mentioned in the beginning of the video - the issue is that BMW puts run flat tires on cars with Adaptive M Sport Suspension which is already quite firm and adding run-flat tires is basically creating a horrible jittery ride, especially at lower speeds and also more for passengers than drivers. I have reviewed BMW 540i with run-flats and BMW 430i with run-flats and those were perfectly fine. My criticism is for X3 M40i. If you scan through online forums you will see enormous complains from owners like myself with run-flats ruining driving experience for this car. Yes, BMW engineers spent countless hours before making this choice but we are the buyers after all and have a full right to express our experience. Most people will not even have a flat in their entire 3-5 year car ownership, yet they will feel the harshness of the run-flat every time they start driving the car. And BMW already knows this and I was told by few dealers they are looking into this. In fact even official surveys like one by JD Powers show that most consumers don't like run-flat tires: www.consumerreports.org/cro/news/2013/04/car-owners-tire-of-run-flat-tires/index.htm As far as why I put All Season tires compare to Summer tires? All season tires by brands like Michelin reached the point where they provide a good blend of performance and comfort and you can still take this car to the snow, and they are less expensive and last longer. Yes Summer tires are still better but the difference is not like it used to be in the past. And for day to day driving you won't see any difference, you really have to do harsh braking, very fast/aggressive cornering to see the difference, therefore I am not sacrificing any of the performance in this car, but instead gained more comfortable ride and car stopped having this jittery feel. Before choosing these tires I have read lots of forums from owners who recommended these tires. Hope this explains it well. Thanks