Best tyre pressures for extended life, boosted safety & maximum grip | Auto Expert John Cadogan

[@noturbo]

the problem is the people who need to see this are not watching.

[@paulsven7923]

spot on

[@BubblesTheCat1]

Exactly. Like my 81 year old Mom driving with her car's tyres at 120. (Kpa)

[@noturbo]

i was doing mine one day older woman asked me to do her's sure no worries had like 15 lb in them on average.

[@MarkSmith-js2pu]

Like most important things

[@johntron7986]

Looooooool bro😊

[@seankirby2580]

You're absolutely right. A neighbour asked me to look at her Mini because she said it was "handling funny". It had run-flat tyres and there was no pressure in any of them when I checked. Nothing. 0psi. She had never checked them and the tyre warning light had never come on, so she didn't bother.

[@skotty1962]

Glad I'm not the only one fussy with tyre pressure.

[@TheEnvelopeOZ]

What do you notice with them? And what psi do you prefer?

[@BubblesTheCat1]

@@TheEnvelopeOZ I noticed a slow puncture on the left front tyre of my car! And I inflate my front wheel drive sedan to 230 in the front, and 210 at the back. I wonder if this is the correct pressures?

[@nelsblair2667]

John wisely switched to O-Light a year ago, to be ready for anything. Then, he was indoors for a year and the O-Lights never failed, when he needed them. If I spend another year in this house, I can be pretty confident that no O-Lights will fail me, when I need them.

[@chrisandshazza01]

The tyre monitoring systems are fantastic. My 16 yr old Jeep has it and it saved me in the Pilbara last Nov. I picked up a small metal spike and the system gave me the warning I needed to immediately look for a safe place to pull off a 100km/h road. 30 seconds after I had stopped the tyre was completely flat and the rim sitting on the road. The following month I was also alerted when I had a complete blowout just outside of Kununurra near the Ivanhoe ..... 44° and a storm approaching, gotta love that. I think tyres are overlooked by many. Great video with great info.

[@ianwright2637]

I run my tyre pressure at 25% above standard setting. It's still below the tyre makers maximum pressure. I get excellent handling and even tyre wear. Ride quality is still acceptable, but you do feel more bumps. People should pay much more attention to their tyres. Good report, could save someones life!

[@gregspeechley882]

A few years ago I parked next to a commodore with a flat rear tyre. Had a child seat in the back so walked across to the outdoor cafe where a mothers group was carousing. The driver of the vehicle said that when she leaves she would drive to the service station and put more air in it. Was able to convince her to call the NRMA (she was a member) to change the tyre by saying they could change it while she was still having coffee with her friends. With her attitude there was no way I was going to change it for her.

[@MrM1CHA3L]

Some just don't care. I just leave tyre shop phone numbers on their windscreens

[@wilson2455]

sounds like my sister.. " you do know there's no tread on your spare tyre.. ", sister, " that's why it's in the boot.. ".

[@the.parks.of.no.return]

Talking to a brick wall - its a Darwinian thing.

[@michaelallen3918]

Or when you are at the shops, it is raining and the car beside you has racing slicks because they are so bald, then you see the 2 baby seats in the back of the car.... People spend big bucks on name brands, clothes, phones, electronics, meals etc, but can't find a little extra to put decent rubber on their cars... Very frustrating.

[@mickthephilosopher146]

When I taught my kids to drive, they were taught to do these basic checks before getting behind the wheel. Then once behind the wheel, I walked around the vehicle to show them blind spots (I am a motorcyclist). I also invested in a quality pressure gauge, as on a motorcycle a one psi change can make a difference.

[@AutoExpertJC]

Well done. 13 points out of a possible 10 there.

[@ScottMurrayBestFamilyCars]

Did you teach them how to correctly adjust their mirrors, in order to eliminate those blind spots (to the pit of hell)?

[@mickthephilosopher146]

@@ScottMurrayBestFamilyCars absolutely, but even when mirrors are well adjusted, there are still spots where motorcycles are not visible.

[@norsehall309]

Did the same with my kids and now the grand kids, cheers. ps I ride a 850 Norton

[@David-lr2vi]

@@Igbon5 Exactly! It amazes me how often I see motorbike riders just sit in someone’s blind spot. It’s no wonder some of them get wiped out. Go past or stay behind, don’t just sit there matching speed while sitting in a blind spot! I used to make sure I got past quickly when I used to ride my motorbike to work.

[@dorstefan]

Tyres are usually the last thing most people think when they are driving. They will first buy some type of car freshener before checking the tyre pressure.

[@AutoExpertJC]

Tyres are THE THING that delivers the most significant performance upgrade in one step - it impacts acceleration, cornering and braking, so getting pressures right is kinda critical.

[@AquaMarine1000]

... and trailer bearings.

[@Hallowsaw]

What is even worse is people will go to a car wash and get tire shine and put on them not realizing that it makes their tires perform worse

[@dorstefan]

@Andrew_koala According to the U.S. Department of Transportation's National Highway Traffic Safety Administration (NHTSA), you are 37 times more likely to die in a motorcycle accident than a car accident - and nine times more likely to become injured while riding a motorcycle than while driving a car. No pressure (pun intended).

[@kaindog100]

I did a defensive driving course over 25 years ago. Three things that have stuck with me are brake pressure in an emergency ( most cars never had ABS back then, seating position and hand position on the wheel and tyre pressures. They definitely make a difference.

[@VivekGangwar02]

hey, can you share this experience in more detail? your text looks astonishing, what does hand position on wheel means in an emergency.

[@77gravity]

Yes, they are at the optimum pressure, checked them this morning - due to the extreme rain, I wanted to be sure. And I check them at every refuel, also. I even took the Subaru to work instead of the Ranger - I prefer the AWD over the extra "fording" depth.

[@N3wbMa5t3r]

Hard to believe you check your tire pressure everytime you fill your tank. 😂

[@ArashFallah]

I ride a bicycle and I check the pressure everytime I ride. I also watched your original tyre pressure video from couple years back and have been doing the four corner pressure checks every other week. It always amazes people, when I tell them that the pressure on my tyres go down 0.1 Bar almost every fortnight. Then they check their tyres with my gauge and they're shocked.

[@1Mitch1Mitch]

Thanks. Confirms what I've found works. Now, 10 or 20% above for safety. How much less for the mother in law's car?

[@Humongous_Pig_Benis]

Less enough so she loses control of the car and crashes into a big fat eucalyptus tree so she doesn't hurt any other people (any more). Blame it on Covid.

[@nelsblair2667]

Haha 😆, great ideas 💡

[@norsehall309]

John great show, I must say sorry for any offhand comments in the past I have been in in a dark place but now help has been found, cheers Mate.

[@stultuses]

Congratulations, I hope the good days for you continue 👍

[@P_Petkov]

Great video. I've always done 20% less than the max rating on the tire. This has been in the same ranges that you recommended based on +20% the car manufacturer's recommendation. It's good to have confirmation I've been doing it right.

[@spikechurchill7478]

Mine are, I checked them on Friday. But I’ll still watch as I’m bored and there is nothing on Foxtel.

[@Humongous_Pig_Benis]

When looking at your tires' wear out is more interesting than TV...

[@joeypahati3126]

So true, I bought my ute that was equipped with S****n tires that lasted only 2 years and half. The problem was they started to spit out the valves. Got myself stranded in the middle of deliveries. In short, I had to replace all 4. Keep up with the info. Keep safe, stay healthy 👍

[@coptotermes]

Interesting video, thank you for the information. A quick point if I may? Every tyre pressure information bite I’ve ever seen has had the “if it is worn more in the centre then it’s over inflated” bit included. Sure this is correct, but in the 39 years I’ve been a licensed driver I have never seen a tyre worn in the middle! My point is, I believe some people have the tyre pressure right, but *most* people have their tyres under inflated.

[@mael-strom9707]

Aircraft mechanic retired ex Air Force... so have OCD about the importance of tire pressures.

[@AutoExpertJC]

At least you need not use anhydrous nitrogen in a car...

[@mael-strom9707]

@@AutoExpertJC Nor oxygen mask and pressure suit... but the time may come if Elon Musk gets his way. 😋

[@AutoExpertJC]

I wouldn't be breath-holding on that.

[@mael-strom9707]

@@AutoExpertJC 😂😆😁

[@chrisandshazza01]

I’m just a nobody - but I love my tyres😌

[@10mbc]

I am 100% sure the pressure in my tires is optimum. Why? Because I follow your channel and you covered this subject before. Nice work dude!

[@AutoExpertJC]

It's all a blur to me... I'm senile, obviously.

[@Ziogref]

@@AutoExpertJC I have too seen your old video. That's why my tyres have an extra 10% in them.

[@markh.6687]

@@AutoExpertJC C'mon man! You know, the tire thing!

[@BubblesTheCat1]

@@markh.6687 Is it tires or tyres? I'm so tired of this argument.

[@peterlattimore6013]

@@BubblesTheCat1 tyres for the English, Tires for the mericans who can't spell correctly... kinda like their dates... all backwards

[@acchaladka]

I just had my winter tyres changed over to the 3 season stock Michelins on my ElectricJesusMobile today actually. (Will check my engine oil and radiator coolant fluids later as instructed, I promise.) The magick screen of my TechnoKing, tells me it’s precisely at 42 psi as required. Thank you, O Great Cadogan Vizier for the reminder.

[@cartoonsbyjohn]

Well said John. So true by my own experience. Most people would be driving their car under inflated at the recommended manufactured pressure and will prematurely wear out their tires. I’ve driven with my tires at 6 psi or more above recommended manufactures pressure and still my tires wear out prematurely like they’re underinflated.

[@noturbo]

put 38 in mine not sure if the servo pumps default back to 32 cause every time i check mine its on 32.

[@murrieteacher]

I am old school country. I do a visual check of tyres as you walk towards car. Check pressure weekly, check wiper blades monthly. Oil and water each refill. Screen washer weekly in summer, (lots of bugs around). 34PSI all four tyres around town, 36 front 34 rear (FWD) on trips because I want some oversteer. On my club car 32 rear and 28 front (RWD and mid engine) John on ultra high performance rubber there are little triangles on the sidewall and the idea is to adjust pressure so the wear touches the point of the triangle. Those guides are also on R spec rubber too. On hillclimbs, the club car pressures go down to 22psi rear and 20psi front. But check out the little triangles.

[@SeeSawMacaw]

I was convinced this video was going to be a chiding for going over. Decades of owning/maintaining sports cars and 1/2 ton pickups (Murica!). 38 to 39 psi cold is what I settled on for all. Everything John states here matches my real world.

[@sirwalksoftly]

Would you agree or disagree to go 3-5 psi above the placard standard in winter time?

[@vburke1]

My 2016 F-250 here in 'Murica calls for 65 psi, identical wheels and tires on the near identical F-350 is 80 psi. Running the 250 at 65 psi makes the front end absolutely chop the crap out of the tread and ruin the tires. At $1000 for a set of load range E light truck tires, I run the full 80 psi.

[@q-chan4764]

I’ve heard that you should check the tire pressure in the morning when it is cooler for the best accuracy. Is there an optimum air temperature to measure the tire pressure? If this has already been asked my apologies.

[@buncho888]

My car has tyre pressure sensors. The pressure goes up by a significant amount when the tyres are warm, 3-4psi. So yes, set the pressure on cold tyres. That way you won’t drop below the minimum pressure which is the danger.

[@default9740]

John, I’m not generally a commenter on KZbin. But that was the best lecture I’ve ever attended. Thank you.

[@PlugNuster]

Where have YOU been all of my KZbin life? You sir just made a subscriber out of me. The way you deliver your content is Excellent. Thank you for what you do.

[@fisqual]

I've argued with so many tire jockeys about this very topic because they always lower my pressure when I come in for free rotation. I have a compressor at home but it's still annoying that they won't listen to me. ...I came to this exact conclusion on my own by monitoring my wear but I've never heard anyone else say this out loud. Glad you did...

[@AutoExpertJC]

It's the only meaningful test (unless you're on a racetrack, in which case you'd data-log the shit out of it).

[@markh.6687]

@@AutoExpertJC Tire shops (especially larger chains with corporate lawyers/solicitors? (AU) may require them to follow the vehicle maker's pressures for liability (lawsuit) reasons. It's simpler to say "we follow the vehicle manufacturer's specs" in court; saves a lot of explaining.

[@imrileth6618]

@@markh.6687 It goes the other way around too sometimes. One time i got new tires (on one of the largest tire shops here). The shop over inflated my front tires to 40psi even tho the recommended is 33psi. And 33 is the best pressure for my car based on my testing as well. I was thinking on the way home that what the heck is going on as the car rode like crap since the tires were way too hard to absorb any bumps. Fixed the pressure at home and car rode great again. Nowdays i only take the rims to the shop and get new tires put on them and put them on my car at home so they can't screw around with my car since shops often overtighten the bolts also.

[@markh.6687]

@@imrileth6618 Sometimes I think they overpressure to mount the new tires, so the tire bead seats on the rim and all that, but forget to lower the pressure. I had lug issues a couple of times, one car went to a different shop after somebody got air-ratchet crazy and I couldn't change a slow-leak tire for repair. Paid the new shop a few dollars to loosen and re-torque all four tires after the leak was fixed.

[@imrileth6618]

@@markh.6687 Yeah. The air ratchet use is a common problem here especially in large shops. They just can't be bothered to use proper tools i guess. That's why i always change my summer/winter tires myself nowdays.

[@justiceforall6135]

Thanks

[@ianwhitford3596]

Good advice John. My wife went to a ladies information evening at the dealership for her car. They were told the placard tyre pressure was all about ride comfort. Her tyre placard says 32PSI they recommended 36PSI.

[@saauuzza]

That's is correct I would do 35 to 36

[@wotid]

I have a bit of OCD with my tyre pressures. For convenience I bought a Jamec PEM automatic tyre inflator / deflator bolted to the garage wall. Set my pressure and run around the car (and motorbikes) waiting for the beeps at each tyre and they're done. It wasn't cheap, but it makes life easy.

[@yggdrasil9039]

I'm glad you said that John, because mine are rated for 230-270kP (33-39psi) but I regularly fill them to 300kP (43psi) as the fuel economy goes up slightly and the drive and handling seems identical.

[@rayjennings3637]

Here I am, John, looking you straight in the eye and saying that unless my tyres have all sprung leaks in the last half-hour, then they are all at the correct pressure as specified by the car manufacturer and they were the same, this time last week. I'm fortunate, in that I have access to annually calibrated pressure vessels to be able to check and adjust my own tyre pressure gauge against. I'll watch the video right through though for information and entertainment. Have a good day, Friday!

[@nicholassimmonds7522]

Are Hankook Tires good I have to change the full set of my tires and Mavis recommended them on the website?

[@destronzo]

Just adjusted to +10% the tyre pressure of my 235/35/r19 Pirelli all season sf3 tyres thanks John!

[@Barrysautospares]

John as much as I enjoy your brand of humour, it was really rather refreshing to go back to information based content; more fact, less acerbic wit.

[@AutoExpertJC]

I'm mixing it up. Thanks for watching.

[@stultuses]

@@AutoExpertJC It's showing and it's refreshing Too much of a thing gets tiresome I think the mix at the moment is good but I'm just one viewer

[@sylvesterzhang1197]

If any of the jokes offended you. Remember you clicked on his face.

[@nikpilly6747]

@@AutoExpertJC 😂

[@tonybruce]

*Checks tyres.....* the wire is for grip, right?

[@AutoExpertJC]

Nah - it earths the car for re-fuelling.

[@markh.6687]

Yes, the grip on your wallet.

[@billharris3650]

Righto John, Hankook Dynapro ATM LT265/70 R16 @ 55psi front, 60psi rear on D40 Navara, 180,000k life. I run 60psi rear as I carry a lot of tools and tow regularly.

[@AutoExpertJC]

Sounds like a plan.

[@billharris3650]

@@AutoExpertJC It worked well, on my 2nd set with the ute at 280,000k's. Original tyres were rubbish, lasted less than 50k and were very unstable with a load in them. The Hankooks are a 10ply tyre.

[@mikebush4335]

2013 i30 wagon.......recommended is 32psi.........major tyre retailer said 36.and at 36 it rides,corners and brakes beautifully

[@AutoExpertJC]

Yeah - just keep checking the wear rate across the tread face.

[@tomkarlsborn2384]

Thanks John. My Pajero states 26psi F/ 29psi R. I have found 32psi all around works nicely when unloaded. I think a good idea is to measure the height of the centre of the hub to ground when unloaded. With a max load in the car, measure it again and top tires up to the same height. Do NOT exceed max pressure of course! In my opinion you will get the same footprint with this method. Your thought on this??

[@pixelcaisa]

I got myself a external TPM system and replenish the air when it drops more than 0.2 bars. The integrated TPM(abs based) car is ok but it only alerts me when the difference is more than 0.4 bars between tyres. I was very surprised that you cannot see the difference just by looking at the tyre between 2.2 and 1.2 bars

[@davidcakers6818]

As a NSW AUVIS I can tell you that during wet weather I find it difficult to get these No Name tyres to pass a brake test, some of the long wearing SUV/ 4WD tyres also perform poorly during brake tests in wet conditions.

[@Alex-tu9bh]

Gotta think about how hot your tyres get aswell, check them after a long drive and see the difference in cold vs hot

[@Digital_Photog1995]

Thank you John!! Well described! I have been adjusting my tire pressures above the placard listed 32 psi for years generally the tires are at 36-37 psi checked monthly unless the ambient temperatures change like Summer and Winter conditions. Average tire life for me is over 40K Miles depending on brand. Currently riding on The CrossContact™ LX25. 38500 so far mounted on my 2017 Lexus RX350. Happy New Year!

[@enzot6283]

Also check the tyre pressures when the tyres are cold.That's why checking them at a service station is not accurate as they've already heated up.

[@malackfortar]

Excellent breakdown, John, thank-you! First time seeing your channel. QUESTION: From a towing perspective I haul a 34' travel trailer (dry 7000 lbs / max 9000 lbs) and an F150 (total length towing approx 53') with cargo such as tools in crew cab, and bed is full (generator, wood blocks, tool bags, ramps, basically I'm a rolling self-repair shop. I used to inflate to sticker inside door my first year or two. But now I inflate closer to the max tire pressure on the tire. Both my trailer tires and F150 are max 65psi cold and I inflate between 60-62. I'll purchase a caliper to get a more accurate wear measurement moving forward, but curious what your thoughts are on my set-up. Trailer certainly pulls better when my tire pressure is closer to max instead of sticker.

[@ralphfrasier2079]

John, I agree with you 100% on this issue sir! Maintaining proper tire pressure is one of the simplest and easiest things a person can do to improve their safety on road.

[@AutoExpertJC]

Totally agreed - and the air is even free...

[@yengsabio5315]

Simplest, easiest yet basic and very fundamental!

[@larryordine7542]

Quality tires at the right pressure is incredibly important, however I never recommend more than 10 percent over placard for any street car. The ride on many cars with responsive stiff suspensions suffers to the point of harshness in my experience. Hondas for instance get really uncomfortable with over 10 percent pressure. I can't get friends to check pressures even after I give them a air gauge. I don't want to deal with "it feels worse." If you want to drive faster I suggest plus size summer performance tires, racing pressures and other suspension modifications like Bilstein shocks. Trucks and trailers are another story. The other factor people ignore is temperature, tires lose one pound for every 10 degree F drop. Good report.

[@scaredyet]

I read online on various forums that people were running 42. I did that and my past two sets of tyres were worn out in the middle. I'll probably go 38-40 next time

[@tcpnetworks]

Yes. I am absolutely confident that 20 minutes ago, my tyres are spot-on for pressure. The car even told me it was happy about the tyre pressures. Even my spare! O'lights are pretty fucking good lights...

[@victorbitter583]

I rego'd the car 5 weeks ago. Car is a 2006 Impreza gg9 (2.0L quad cam with acvs). It gets driven in a spirited fashion on ocassion. 2 tyres were in a condition that I wouldn't have complained about if they didn't pass inspection and the other 2 were borderline. All had plenty of tread remaining in the centre of the tyre. I replaced all 4. I'm an ex tyre fitter/wheel alignment tech and should really know better. I'll be pumping mine up to 36-38psi tomorrow. If the camber is non adjustable (havn't looked yet) I'll buy some offset bolts and get a lil neg camber going (tyres were more worn on the outside). That should keep me outta trouble for a while. Most modern tyres have less tread on the shoulder of the tyre than they do in the middle so your advice about not overinflating the tyre beyond the manufacurers limit as per stated on the sidewall is great advice. cheers.

[@VH-eq2ci]

I'm telling you that they are. In Europe 1% of the people know that the car has tyres.

[@Steven_Rowe]

Hello John Great video What I find interesting is the tyre placards and also what tyre retailers say. A tyre retailer will tell you that the placard pressures are there so your ride is comfortable. The retailers will tell you that a higher pressure is better for safety and wear. What they say seems intuitive to me but surely the car manufacturers also know this so why don't they save us all the doubts and put a higher pressure on in the first place. I'm not an expert or an engineer and the bottom line should be this is what is required so just do it. Thanks for you great videos, even the funny ones.

[@michaelhoulden9018]

Thanks for this. I could have used this on my last dealership visit. The pseudo-technician at my dealer recently read me the riot act about over-inflating my tires when I was complaining about an alignment problem. (Took wearing out a set of tires, 60000km, and 4 alignments for the whack-jobs to figure out one wheel was dynamically unbalanced). I had, properly, bumped up tire pressure to account for maximally loaded driving conditions. Helpfully, the pseudo-technician reset all my pressures to placard and sent me on my way. To the nearest air compressor. FFS

[@wsoxman5375]

I want to know what is the best surrounding TEMPERATURE to measure the PSI? I'm in Arizona. I put about 2 lbs more in each tire.. 35 front and 33 rear RDX . The garage Temp was 56deg. I drive later when the Temp was 75Deg 37 Front and 35 rear.

[@az958]

Its nice to have someone talking about actually useful stuff. I mean 0-60 times on cars that most people will never be able to afford is fun. But this shit is a lot more practical, usefull and makes a owning a car more involving.

[@bonnevista]

But John, I have a left hand drive car here in Straya. It's an old American barge with tyres at the cutting edge of tech - 235/75R 15. With a white side wall...

[@AutoExpertJC]

Don't tease me. What did you do to deserve that? It must've been bad.

[@bonnevista]

@@AutoExpertJC It's not just the tyres that are cutting edge. The whole car is. There are cutting edges everywhere...

[@daveblock4061]

I am absolutely certain. My Lotus is set at 24F 27R cold and my ute is 30 PSI all round. I check whenever the ambient air temp changes by 20F or every other fill-up.

[@MrWilliam.Stewart]

Bloody good report old chap. All I heard was run 50PSI in those Pirellis, cause I'm a simpleton, but not too simple to deduct 10 percent, because, road.

[@TS-gg9dk]

How much is the difference checking the tyre pressure Cold vs (let's say) after driving 10 minutes on highway? About 0,2-0,3 Bar? So then I need to be that much higher when filling. If my hot pressure reading is 2,7 Bar, it means it was 2,4 when cold. I tend to want to keep it at 2,7 Bar, measuring after driving. Also I just put new summer tyres on my car, which is a sporty front wheel drive car. Therefore I put the new=best tyres in front, because the front tyres do almost all the work, braking, accelerating, cornering. The rear wheels have it easier as they can "just" roll along. I bought Goodyear Eagle F1 Assymetric 5 in 235/40 18". I know it's been said to put the best tyres at the rear, but for the reasons I mentioned I put them front.

[@NNoradIV]

Weekend track day guy here. That 20% is right on the money. I haven't learned anything here, but everything you say is on par with what I have learned from personal experience. Most weekend racers seem to think that lowering pressure is the way to go because that's how drag race is done. It only lead to overheating tires.

[@edwardmpace]

Thank you for the information! I do have question about tires regarding deflation. So when I lived in Alabama, 'Murica, people would go muddin'. When they would get stuck they would lower their tire pressure to 5 or 10 psi. Was for traction in the mud and sand? Would it make that much of a difference? Thank you for all you do!

[@r.fortner4661]

Wow. What a wonderful commercial on flash lights. Oh, and the bit of info on tires was kinda interesting!

[@spudsmckenzie4123]

Yes sir my tyre pressures are correct as of 5 days ago. I do this once a fortnight so I don't have to feel guilty when I see videos like this. Negative reinforcement does work. And well. My family's safety and well-being thanks you for it.

[@AutoExpertJC]

Eggggggggcellent!

[@spudsmckenzie4123]

@@AutoExpertJC I see what you did there! 😆 Many thanks for all the advice and wisdom you've imparted upon so many of us over the years. You do great work and it is very much appreciated!

[@HavokTheorem]

Other reason the passenger side tyre will wear faster is because that's the outside tyre which is doing the bulk of the work going around roundabouts.

[@phillipevans9414]

Frank Reading. They also cop additional load in ordinary driving compared to the other side due to the road camber.

[@trput3824]

@@phillipevans9414 Many experts argue this point and claim it's all about cornering and that camber is irrelevant. But road camber means the front outer tyre is always taking slightly more weight and is responsible for steering the car slightly uphill to maintain a straight line. My Prado ate the outside of front left tyres, and it was mostly used for touring duties. Perhaps it's a conspiracy to protect road-builders against being sued for excessive tyre wear due to poor road design. :-)

[@johnbailey3351]

Tires and brakes, the two most important thing on your car from a safety perspective. Great video!

[@CynHicks]

Ability to accelerate out of bad situations have served me well also. There is something to be said for knowing your vehicle limitations though, for sure, and brakes/tires play a big role in stopping/handling. I guess my point is that proper equipped "performance vehicles" are safer than economical "sloths" when driven properly. Maybe only slightly but...

[@nevillegreg1]

Just for interest sake, I fitted Steeda Spyder Rims with Michelin Pilot Sport tyres to my 2015 Mustang, which were subsequently transferred to my 2018 Mustang. Now I'm talking over $500 per tyre in addition to the $500 for each rim - quality in both departments. I check the air pressure regularly for the very reasons you mentioned, but what I have found incredible, is that they have never even lost 1 psi in all that time, although I've adjusted the pressures depending on wet/dry conditions and if I'm taking it out for a drive in the country with the lads or with the wife.

[@Davido50]

Wise. Mustangs are great vehicles!

[@brettrogers8482]

Very helpful-thank you, John. Confirms I am already on the right track pressure wise.

[@ztuber7763]

Do tyres have a shelf life? I'm a low distance driver of about a couple thousand miles a year. Should all tyres be replaced regardless of usage after a number of years?

[@vadimsayenko7143]

10 years

[@stultuses]

Excellent video You take those things people think they know and take for granted and expound on them I just went out tonight in the rain, got back and saw this video pop up and now I'm thinking, it's been a while since I checked my tyres, tomorrow morning when hopefully there's a break in the rain, I'll be checking them I drive a Delica, it's an awesome vehicle and I buy tyres that are as wide as my vehicle will accommodate and I pick the ones with the highest wet ratings as I figure that's when tyres are most called upon to save my arse. I never cheap out on tyres, if it's say $30 extra for per tyre, big deal, that probably gets spent on coffee over a short period anyhow Perhaps I'm wasting money on going for wet weather tyres as preference but in my ignorance it's what I've decided to focus on It's good to know one can go up to 20% extra pressure on the tyres, I didn't know how much extra one can go to if required. I had a mechanic once try and fix a fuel performance issue by going insane on the pressure to try and reduce rolling resistance. It worked but I literally bounced down the road, lol. He's now gone out of business, I wonder why... Did I say what a great video this is 😀

[@scottsummers819]

I run the all terrains in my Dmax at about 40 because that's what gives it even wear, particularly on the front as the OEM tyres scrubbed out on the outer edges on the front end, probably because of the added weight of the Bullbar (50-60kg). The thing that shits me is the placard says 32psi, so when it goes in for a service that's what comes back, so after every service I have pump the tyres up again. Grrrr!

[@AutoExpertJC]

Just instruct them to leave it at 40.

[@scottsummers819]

@@AutoExpertJC Sometime they listen, sometimes they don't. Probably a liability thing, if the placard says this and the tyre blows out because we didn't make it match then we are responsible.

[@AutoExpertJC]

Problem at dealerships is: You never talk to the guy who does the work.

[@scottsummers819]

@@AutoExpertJC Yeah exactly.

[@user-md7vi2dw7j]

So, for the best grip, which pressure is required?

[@paulgee8253]

Great video. Proper tire pressure ( and tread) is key to preventing hydroplaning too. In hot areas we found pressure loss causes flexing and heat build up and occasionally disastrous tread separation. Your life really does ride on those tires.

[@FERRARIlegend1]

Dear John. I hope your ok. Can I ask what is the facination, you have with torches. You keep sharing flashlights that can send messages to the voyager probe the lights that bright. is this an Australian thing ? in the Uk we have one torch, a torch that gets used yearly around Christmas time to get the decorations out. You guys have torches to compete with the sun. I assume it's very Dark at night where you are but why so many ?

[@nvrmnd9748]

300nzd for a tyre, 2nd tyre in a month different wheel. This video definitely explains a lot. Great video thanks for the knowledge 💯👌🏾

[@mountainhobbit1971]

I live in a high desert area of the American southwest where we often get 40-50 degree temperature swings all year long. Any words of wisdom for situations like this?

[@stephensmith2027]

Just a comment that rear tyres are important (even on FWD) for wet weather driving and not aquaplaning. I always thought the better tyres on front for FWD due to them being driven wheels, but I've recently learned the advice is to get the better tyres on the rear as the last thing you want in the wet is aqua plane induced oversteer.

[@artmallory970]

I've always heard putting the best tyres on the front, even in a RWD car is best...

[@AutoExpertJC]

Understeer aquaplaning is also pretty dire. Honestly I think there are pros and cons with both approaches.

[@stephensmith2027]

@@AutoExpertJC in either case the solution is good tyre rotation and good tyres, who would have thunk it

[@martinlang9615]

I’m a bit confused as you say for a four wheel rotation just go front to back, where as the pattern online says cross them only in a four wheel rotation, as in when bringing the rears up to the front, swap sides and take the front ones to the back. Which is better and why?

[@8359s]

Just bought Michelins PS4S for Audi S4 and the manufacturer says fronts should be at 2.7 and rear at 2.3bar and 2.7/2.7 when it's fully loaded, but Michelin suggests 2.82 bar front and rear. Why, what are the implications? The car's weight balance is 55% front 45% rear when I'm not in it ;P. Also I've set the suspension geometry and the front camber is -1.2 degrees and rear at -1 degree. I guess I won't get even wear because of the camber no matter the pressure. I check tire pressure every 4 weeks(more frequently in the past) and set it to 2.7bar front and back, also checking the torque on bolts.

[@chrisej5987]

In the track world, I've always been told to run lower pressure because they get so much hotter quicker that you need to compensate at cold readings (and/or the lower pressure yeilds a larger contact patch). Then there's real serious folks measuring hot to see what they're actually getting to of course.

[@AutoExpertJC]

In the track world, testing determines best pressures. You do it with proper scientific controls in place.

[@4G12]

Don't forget to measure the tyre temperatures across the entire contact patch if possible, with at least 3 measurements per tyre (inner, middle, outer) to make sure the temperatures are relatively even across the contact patch. The budget option is just to measure the temps right after pitting, but ideally, one should measure tyre temps in real time and record them for proper analysis. To be fair, this is getting into serious professional territory, so the average weekend warrior should do decently with the much more economical measure right after pitting method unless one's somehow lucky enough to access the necessary tools. On track, assuming your tyres have strong enough sidewalls, running lower pressures with more negative camber is one way to gain laptime on circuits with relatively large amounts of time spent cornering. The ideal tyre contact patch is infinitely compliant in ride, but relatively stiff when twisted (e.g. when steering) and doesn't move sideways much upon application of lateral force. The best approximation of this sort of behaviour we can practically achieve presently is via radial tyres with stiff outer sidewalls and tread, run with enough negative camber and low tyre pressures.

[@off-roadingexplained8417]

if you've lifted a vehicle... and as part of that you have upgraded the tires a little bit... let's say you keep the series the same and you go up two sizes on section width... that larger tire will carry more load at the same pressure... should you reduce the pressure to match the load? or... should you say hey... you know what....now that this is lifted.... the tires are under more load anyway... how about keeping the pressure? ...

[@robman2095]

Another few reasons why it pays to go 10-20% over: 1. If you are a bit inclined not to check the pressure very often then the period that you can go without checking and still remain at or over the specified pressure is increased. 2. If the servo pressure gauge is out of whack and tending to slightly overstate the pressure, by going 10% of so over you are still at least at the pressure specified by the manufacturer. If the servo pressure gauge is understating the pressure you can still afford the extra 10% and remain well under the specified maximum pressure of the tyre unless the servo gauge is totally stuffed. If it is stuffed you will probably realise that by how long it takes to get up to the "correct" pressure and how it feels when you drive off. 3. If you tend to not check the spare (if you have one) as often as the other tyres because it is so inaccessible, then you probably want to intentionally overinflate the spare when you do, so avoiding pulling out the spare when you really need it and finding it is flat or well under the required safe pressure that you need to continue your journey. The overinflation that you want might well be greater than the 10-20% of the other tyres and still be OK providing it is below the maximum pressure specified by the tyre manufacturer, and provided you take account of it possibly being greater than the other tyres if you put it on without being able to check the pressure.

[@macflyguy5166]

Does this go for 80psi 3/4 truck tires you air down at the end of their life in attempt for a softer ride before you buy new Ko3z?

[@terryyouth]

I had a nail in my tyre. I didnt realise till i saw a warning light on my dash ( Subaru Forester) and the pressure was 140kpa when the other tyres had 220. So i could stop by top up the pressue and then take it to garage next day

[@daniels4742]

I have a button I can press to let the car know what pressure my tyres are at, if a tyre gets below the set pressure the car will let me know. Are these generally reliable? I'll lose around 10% pressure before it lets me know. It's, sorry to say, a 2018 Audi. Thank you kindly.

[@aussiebloke609]

Every time I've bought a new car, I've started with about 2 psi extra in the front and 1 in the rear, as I do like to press on in the bends (I learned to drive in a Leyland Mini - and they're all about maintaining momentum around corners, as they really didn't accelerate all that well with only 40hp.) But no matter how much "spirited" driving I do in the twisties, it seems I always end up with the most even wear (and thus the best grip) with no more than 1 psi extra in the front at most, and no extra in the rear. Not sure if this is because I tend to drive smaller cars with relatively wide rubber (so they're inherently a little easier on the tyres) or what...but it seems to work for me. :-)

[@travisp11]

Out here in Nebraska we have temperature extremes, especially in the spring where the outdoor temperatures can vary over the course of the day and can drop or raise your tire pressure significantly. Checking the pressure has become a habit for me because of it.

[@Hemshemsems]

I've always adjusted lowprofile tires like the p-zero there differrent bcus of a article a read decades ago. That being the sidewalls are hard and width being wider - then the center of the tire needs more pressure to keep contact. So the opposite was stated for lowprofile - more pressure for wear on the middle and vice versa. Normal ballon tires are still as stated. Anyone have the same opinion here or mainly differ?

[@simon557]

I have Yokohama advan sport, it's written max pressure 58psi in really small and aswell it's written "never inflate beyond 40 psi" why ?

[@davidmoynahan9585]

I do the front/rear rotation swap to even the wear and also have them turned on the rim so the axle pair can be swapped from side to side while maintaining the rotational direction. The combination of f/r and s/s means I can get a worn set all about the same time. Tyres also are subject to deterioration by aging, so be replacing all four at the same time, I get new rubber in all corners, and the advancements in tyre technology. Note this only works for symmetrical tyres (no direction arrow on the sidewall). I do check my pressures monthly and/or before heading off on a long drive at a local servo (Service Station, Gas Station). The distance from home to the servo is less than 1km so I don't think the pressure would change much in that short drive. Reasonable assumption? assuming I might need a couple of PSI to get back to the + 10% mark. Interested in your advice thanks.

[@maitrikashin3906]

Just ordered an after-market wireless 12v TPMS... accurately reads n displays pressure and temp in all 4 individual tyres. Only hassle will be airing down/up for 4WD off-roading... it takes a bit extra time to take them off and refit... but safety isn't a race, so I'll deal with it. Just wondering why OZ has so far avoided what the yanks have had as mandatory safety on all cars from 2008? Any thoughts?

[@baileyhatfield4273]

I might have to try out varying pressures and see how my car drives. Maybe get some 38psi in the tires when it says 32 and see what it does. I got MAD camber issues on the rear, so tires die soon regardless.

[@outlandyishrig2557]

Good video John for the average punter ! I'm still running original tyres on the Kluger I bought new 2015, looking after pressures, etc. has served me well, as just clocked 70,000 km, I will be buying again the Michelin Latitude HP's,

[@klauserwin9860]

First of all: No, I am and do not want to appear like a smartass. But please allow me to ask a question: John, you said, that if you are driving on a track, you want to increase the tyre pressure. But driving the car hard on the track would increase the tyre pressure anyway, because of the increased friction, right? So this would increase the tyre pressure additionally. Is that safe?

[@ranger178]

I like to put in a few extra pounds for a firmer ride and less sway on highway above their recommended pressure, but most people are not checking tire at low temperature of the day it could be 3 or 4 psi different on cold morning than afternoon sun. the only thing I worry about is will a few pounds more pressure increase stopping distance?

[@PeterGottschalk63]

My placard says 35 PSI cold but in 80 degree weather they balloon up to 42 PSI I'm rather concerned because they may pop what say you? Cheers from Chicago!

[@RandyHartono]

Yes, recommended Tyre Pressure plus 2 psi

[@AutoExpertJC]

Not a bad ballpark plan.