Square Taper Bottom Bracket To GXP Bottom Bracket Replacement

[@RJTheBikeGuy]

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[@oscarpetrus666]

I want to see how to remove it please

[@RJTheBikeGuy]

@@oscarpetrus666 Just watch how it is installed. Then do the opposite.

[@petersymons7817]

Thank u.

[@savoirfaire8979]

RJ The Bike Guy and the Park Tools tutorials are the best on KZbin.

[@paknagasing7543]

This guy is actually excellent. His speech makes it so easy to follow the steps.

[@snapshot4691]

+Pak Nagasing I agree. Too many of these YT videos have poor acoustics. Can't hear half of what they're saying or droning. RJ does a very nice job.

[@aros007z]

Yup, he is good!

[@beaudanner]

That was fantastic. That was a really helpful step-by-step guide. I really like my local bike shop and will use it for removing and pressing in my new headset but I wanted to try this bottom bracket myself. I have the exact same job, going from square taper to external. I'm sure this would cost double for what I spent on tools. Can't wait to try. Thank you for the guide as it gave me the confidence I needed.

[@arsaeterna4285]

It's been so long since I've worked on bikes just seeing the loosening of the crank bolts really takes me back I think I used to open up every new or used bike I bought just to grease everything up Good times, just bought a bike again, looking forward to the weekend to set it up!

[@jesuscruz836]

Of all the bicycle channels I have found yours is the most helpful! THANK YOU!

[@robinsonmitchell9995]

Thanks first for showing that it's possible, and then for showing that it's actually not that complicated. Got the old riveted together steel square taper crankset and BB replaced on my MTB with a new Deore Hollowtech II BB. Took about 45 minutes start to finish, including hunting through my toolbox.

[@jtk1ify]

just discovered your video and find them really practical. especially when you do the work live rather than pre-do the task as some videos do. With your videos, like the fork removal one that i watched earlier,the viewer gets a true picture of what the task involves particularly with seized in parts thanks

[@johnbessey9105]

I very rarely comment on videos, but in the midst of a bunch of confusing technical noise concerning BB's, this video made it super clear and easy to understand. Thank you so much!

[@latrace1986]

Easiest bottom bracket removal ever. I've had nothing bit issues with old, seized up BBs in old 90s bikes. Finally broke down and got a big impact driver from Harbor Freight to finish the job.

[@Daluke61]

I'll be upgrading my bike's drivetrain from a MTB gearing setup to either a 1x or 2-ring road type deal with an ultimate goal of installing a Quark (spyder) power meter. FWIW, bike has a 73mm BB shell. This and other related videos of yours will be a very helpful aid if I choose to buy the necessary tools and do the work myself. Thanks so much... feeling inspired!!

[@mashkal2006]

God belss you RJ the Bike Guy! I could not figure out why my brand spanking new GXP BB and Apex cranckset didn't work properly, or at all even though I had followed all the manufaturer instruction regardin compatibility and installation. Removing the spacers did it. Cheers!

[@RJTheBikeGuy]

kzbin.info/www/bejne/emK4eaeLqcSJaLM

[@mashkal2006]

@@RJTheBikeGuy Thank you! I wish I had found this video before. Or, much rather, that the manufacturer would take as much care about their instructions as do KZbin enthusiasts. Your generousity in sharing your detailed knowledge is invalubale for people like me (novis cyclist). Best wishes!

[@Buck2901]

I should call you RJ My Bike Guy. Thanks a lot for posting that, I can now go in my garage in peace!

[@misterngan]

Thank you. That's really clear instruction and this is exactly what I am trying to do with my bike, replacing the square taper BB with another BB for my new crankset.

[@Mr_BUSINESS_24_7]

I love upgading old unique frames that are in good shape with newer technology. The guys at the bike shop like to look at me like I have 3 heads for dumping so much time and money into a frame worth $60. But if its a rare frame in good shape, why not ?? Facing, is that just for press fit cups ?

[@RJTheBikeGuy]

+christopher shara Do you have a reason to believe the BB shell needs faced? Was there damage to it?

[@Mr_BUSINESS_24_7]

No. I watched a video that said whenever retrofitting from a cartridge (JIS) type BB that the BB needs to be faced.

[@Mr_BUSINESS_24_7]

I have a threaded English 68 mm. I don't see the purpose of facing a threaded BB. If the cups thread in, then they would be installed properly (90°)

[@RJTheBikeGuy]

Yeah, a lot of stuff says face the BB shell. The tool expensive, and even my local bike shop said it really didn't need to be done unless there was some sort of damage or reason why they wouldn't be flat.

[@Mr_BUSINESS_24_7]

Thank you for your professional advice. I watched a 28 minute bottom bracket tutorial "Bicycle Bottom Bracket & Crankset Types Compatibility Identification Spec. Guide." Excellent, excellent info !! I'm between XTR FC M970 or FSA SL-K. The XTR's I believe are lighter. But I have SL-K bars and stem. Any suggestions ? Anni headed in the right direction ? I know it's kind of subjective. But you know more than I do.

[@bicycledad7660]

Why is the newer style better ?? I need to change the tapered square style and wondered. Thank you for all your help !

[@RJTheBikeGuy]

The bearings are larger and farther apart. Less crank flex. They are also lighter.

[@dperreno]

@@RJTheBikeGuy They also allow for a larger diameter spindle, which is both lighter and stiffer.

[@arrongarcia175]

Liked and subscribed...new mtb guy!! super clear and showing all the steps...thank you!

[@earnestr35]

Great job... I really like watching all your videos, they are very helpful, thank you!

[@mywaveinwoodswoodperfumes]

I’m about to convert my square bb to bb52 Shimano, but I’m still looking for few tools. Thanks for the video very helpful

[@alexbraun2243]

Is this "new" bracket system better that the one you replaced?? That removal tool is expensive!

[@NikiDorian]

Perfect tutorial. Thank you, Sir!

[@outkast1464]

hi just wondering if a square tapered is better than a gxp bottom bracket and if you change the square to gxp like in video can use back the square tapered cranks on the gxp bottom bracket ?

[@RJTheBikeGuy]

Generally GXP is better than square tapered as the bearings are external, farther apart, so more stable, and larger since they are not restricted to the space inside the shell.

[@RJTheBikeGuy]

But yes, you can go from GXP back to square taper.

[@RJTheBikeGuy]

And GXP is probably lighter as well.

[@JustinC905]

RJ The Bike Guy Have a question for you. Bought a 2013 Masi Uno early Spring, I want to put a new bottom bracket and crankset on. Will a SRAM Omnium BB and crankset fit?

[@crazyblazeyblaze7736]

Thank you sir, Great video, I am going to use your tips tomorrow, on my mountain bike.

[@CGGarage]

Hi I commented on another video of yours, but this is the exact set up I'm looking for.. I currently have a 1 piece crankset.. With the adapters you installed, can I achieve the GXP cranks? Thank you

[@RJTheBikeGuy]

I answered your other comment.

[@RandyDarkshade2]

I prefer sealed bottom brackets because I think they last longer and are much smoother. Also, make sure you put a sealed BB in the correct way round. I had an idiot moment recently where it I couldn't get a sealed BB to screw into a bike frame, I eventually realised I was trying to put it in the wrong way round. lol

[@dapster]

+john smith Not only that but square taper cranks can take the abuse of everyday riding for people like messengers & food delivery people. You can go years before changing the cranks and bottom bracket whereas with most external bb's you'll be lucky if they last 6-9 months. Sram Omniums are known for their shitty bb's. Plus I've had friends get hurt because they are riding and one of the crankarms falls off with these types of cranksets. I'll gladly choose square taper over these any day.

[@samanderson7745]

+dapster Sounds like some shitty install on those external BB's if crankarms are falling off. I've been running BB30 on my road and triathlon bikes with GXP on my cross bike with no problems. My triathlon bike by itself has over 3,500 miles on it and I'm still running the same BB. I do prefer ceramic bearings over steel as they're less apt to warp, but friends have been running steel bearing BB30's and GXP's for thousands of miles with no issues. If you like square taper then stick with them, hopefully nobody is going to dog on you for it as every rider has their preferences, that's the beauty of this sport.

[@maximillianchong9934]

dapster

[@dapster]

Sam Anderson GXP's, the exact type of BB that I am talking about. 3500 miles in what period of time? I do that in about 5 weeks, not 6 months as a courier. Plus no one has ever "dogged" me for using square taper. In fact, quite the opposite (you were right. Square taper lasts so much longer than what I've been using. Why didn't I just stay using ST? Oh that's right, looks.) As far as a shitty install it's far from it. Then explain to me why I've had the same crankset and BB since 2008 - installed by the same exact shop as most of the people I know who use Omniums - and yet it seems like every 3-4 months someone I know has had problem after problem with the GXP bottom brackets such as cracking, loosening, or failing. It's not the person installing it as much as it's the product themselves.

[@dapster]

Maximillian Chong What happened? Cat got your tongue?

[@waffles6095]

Hi Rj I have new road bike steel frame only I prepare to put old bottom bracket instead new sealed bottom bracket. give me some brand & what size fit for my steel frame. Thanks

[@ryleyochsner8643]

Have you worked on any klein pressed in square taper bb. I have one and its getting pretty worn and want to be able to install newer parts

[@RJTheBikeGuy]

I have not.

[@ryleyochsner8643]

@@RJTheBikeGuy any recommendations for parts or where I should start?

[@RJTheBikeGuy]

@@ryleyochsner8643 I am not familiar with it. It will take research. It's your bike. I am not doing your research for you.

[@ryleyochsner8643]

@@RJTheBikeGuy sorry guy. I Wasn't asking you to research anything. Sorry to bother you. Didn't realize I was bothering you so much

[@kylereich404]

Great video. I know it’s kind of straightforward but here goes , What if I’m going to convert back to square taper from bb30. Any thing I should be worried about / know beforehand. B.B. shell measured 68mm Thanks in advance

[@RJTheBikeGuy]

Not even sure it is possible, unless there is some sort of adapter.

[@Juramentu]

Any advice on GXP bottom bracket? the left side bearing fails too quick, any hack to make it like shimano?

[@jrkoensgen]

Love this! Thanks for all the videos! They really demystify working on your bike(s)!

[@lindner2736]

Hey I am trying to follow along with this hybrid to cyclocross build, but the videos are not numbered, have similar titles, or on a playlist together. How many videos are in this build? Could you organize them in a way to watch this bike be completed?

[@bicycledad7660]

I want to do the same on a mountain bike so I measured the bb shell at 68 is that all the measurements I need to get the new one ? And what crank did you use ?

[@RJTheBikeGuy]

Asking the same question in multiple places is a quick way to be blocked.

[@bicycledad7660]

Sorry didn't mean to piss you off. Was just didnt know since the video was older if you would see it. Then I heard you say Facebook so I went there. I'm not a bike mechanic so I'm learning as i go. The bb is priced good on Amazon but can't find an affordable match. Im not computer savvy.

[@jonathanfarrely83]

great video RJ THE BIKE GUY really loving your videos im doing a bicycle mechanic course in april so there giving me a lot of help

[@dragonclaw88]

thank you....appreciate all the hard work you put into your videos

[@Vova3iLvova]

i wonder if you can change only the bearings on the new BB that you installed or you have to change the entire unit

[@RJTheBikeGuy]

Not sure if the bearings are replaceable. I have only had one go bad, and it was destroyed.

[@jahoansie]

Hi,Great vid! will there be any issues with chain angle/front and rear ring alignment with the new wider bottom bracket? Cheers!

[@RJTheBikeGuy]

+Paul Jones Not really, because the chain line is about the same.

[@jahoansie]

+RJ The Bike Guy Sweet! thanks for the quick reply!

[@TonyJoyVlogs]

Hi Rj I have a concern what if i change 48/38/28 crank to 44/32/22 crank do i get any problem on my chain? should I make them shorter or i leave them as it is?

[@RJTheBikeGuy]

kzbin.info/www/bejne/e33WfKWdidljpbs

[@nicholasosborn6334]

I noticed you went from a 3x crankset to a 2x crankset but didn’t change your derailleur. I’m guessing you don’t have a hand trigger/clicking style derailleur or do you? If you do have a trigger/clicking style then I assume you would need to change the derailleur as well, right?

[@RJTheBikeGuy]

The limit screws on the front derailleur will limit how far the shifter will shift. You can use a triple shifter with a double, and will work fine. I did eventually replace the FD. Maybe a couple times I can't remember. At least once when I went to a compact crankset.

[@GokkunGuru]

Since you were using a cartridge BB, by converting to an external bearing kind, would the inherent chainline of the bike be altered? How do you fix this?

[@DYNABIKE1]

I'm replacing a sealed cartridge on My eBike right now. What is the advantage of that GXP style ? What is the difference / advantage ?

[@lanangtenan123]

Hi.. some suggest that we need to get the shell faced before changing to external BB like GXP. any thought on this? I saw you just did it without facing. great video. thanks.

[@RJTheBikeGuy]

Most bottom brackets will be fine without facing. Facing just makes sure the two faces are parallel.

[@mastermetalshredder]

Great work RJ!

[@dna8964]

Tank you for your "tricks off the trade." I am an intermediate MTBr and have a Bianchi with threaded square taper and am beginning modifications. Question: Do you have any advice on good, quality and cool crankset so I don't have to upgrade BB yet? Sorry this might be a broad inquiry,,, Thankg again and please see doing what you're doing. Darryl

[@RJTheBikeGuy]

+Darryl Nuncio Sorry, but you need to do you own research and find what your needs and budget.

[@chriswarr3676]

What's the best grease for it? And it possible to put a crank on an 8 or 9 speed?

[@RJTheBikeGuy]

I use marine grease.

[@davinlg1]

Would using an anti-seize compound like Permatex be equivalent to using bike specific grease on bike threaded fittings, such as BB retaining rings and bolts? Based on 25 years of working on cars anti-seize has been my go-to for thread treatment. Could it be that a bike isn't subject to the higher temperatures so the grease is fine, given the convenience of having it at hand? Or is there better performance (water resistance?) to the grease? And THANK YOU for the excellent videos! In the last few months I've jumped into working on my 12 year old MTB and found I really like it, with your excellent videos to guide me around the tricky stuff!

[@Vova3iLvova]

thought the threads were normal and instead of unscrewing BB i torqued it down pretty hard hopefully it didnt damage the threads the heck did they need to put different threads

[@RJTheBikeGuy]

Because right hand threaded cups on the drive side can work loose with pedaling. Still, older French and Italian made bikes have them.

[@maximillianchong9934]

Vova3iLvova o9 the polo O op is to make this A on o9 polo to oOO popo Polo O pop oooOO popo hoooooo OF those courose you

[@TheLedzeppfan]

RJ The Bike Guy i have an aluminum track frame with the sram truvativ bb that came with the s300 cranks. Only problem is chainring to chainstay clearance is less than a mm. I added a 4 mm spacer and is now 1mm clearance. Will i have issues if frame flexes? Thanks in advance

[@RJTheBikeGuy]

The frame came set up like this? Did you install the BB or did someone else, or did it come new like this? How is the chainline? Adding the spacer didn't cause the bearings to bind? I need more information.

[@TheLedzeppfan]

RJ The Bike Guy no i bought the frame and bb separately. I installed it myself. No the bearings didnt bind bb spins freely. I havnt ridden it yet so i dont know if thats a factor

[@TheLedzeppfan]

RJ The Bike Guy chainline seems to be ok. Crank arm to chainstay clearance is about 4mm

[@meanish2988]

This is just what I needed. thx a ton RJ.

[@jay-rm.ballon2824]

May i ask the size of your frame bottom bracket? I have an old GT bike but the bottom bracket has a bigger diameter i assume its like 36 in diameter

[@lethal.8903]

What is the diffrence between GXP and Hollowtech 2?

[@aktux]

Thanks! Great explanation! One question though any tips one can do to achieve the correct torque without the torque wrench ?

[@RJTheBikeGuy]

Not really.

[@aktux]

Thanks, once I get my Hollotech II BB, I plan to first use my hand to tighten as hard as I can before use the tool. Then I believe one quarter turn with Shimano Hollowtech II 2 Wrench Crankset will be sufficient.

[@osaelbarrantes8060]

Thanks a lot. What are the realistic advantages of doing such a retrofit; as I have an old racing bicycle with an older BB than that, and I could replace it, if it is cost effectve.. Saludos de Costa Rica, Hasta la vista...

[@RJTheBikeGuy]

Newer cranks. Lighter. Bearings are farther out so less flex in the cranks.

[@KarlLindemann]

Did not facing the bb shell affect the performance of the bb or the crankset?

[@RJTheBikeGuy]

Not so far. From what I am told, a bb shell really doesn't need to be faced unless there is some damage that needs to be corrected.

[@ripp3rjak934]

@@RJTheBikeGuy can you explain if Facing or tapping threads mean the same thing or.different?

[@Nwrig004]

Nice real world videos thanks for posting im using this video to replace my 9 spd Sora with a 105 5800 group. Camppy crankset is nice that should be a stout a CX bike when you're done

[@SadBoy-zm5pt]

Is the gxp bottom bracket still useable without the dust cover and the middle part?

[@sunndrac]

Nice video. What do you recommend, GXP or Hollowtech bottom bracket ?

[@bogdanchiorean2762]

Hey RJ , do you think that I can put bottom bracket like that on a specialized crossroads Cruz from 90’s ? Thanks

[@RJTheBikeGuy]

Probably.

[@jeffbarish9105]

I have a 1995 Trek 1000 Road Bike. Feeling like I felt grinding when I really applied pressure on the pedals and thought it would be best to clean and lube the Bottom Bracket. After watching so many BB videos I finally gave up and called Trek, after 30 minutes of wait time, was told it is a sealed BB. Thought was take it apart and see what it is and order a new one. When I took it apart, it was not a sealed BB, and not one video I have watched even looked like what came out. I cleaned it and lubed it and put it back together, later today when I take it out for a ride, I will know if it worked.

[@RJTheBikeGuy]

kzbin.info/www/bejne/r6POoplvZq2SkM0

[@jeffbarish9105]

@@RJTheBikeGuy That looks like it.

[@RJTheBikeGuy]

@@jeffbarish9105 You can install a cartridge bottom bracket if you want. kzbin.info/www/bejne/Z3PVh516e9aiqqc

[@jeffbarish9105]

@@RJTheBikeGuy Wish I would have seen this before, would have been a help. I watched the video you did on converting the shifters on the Trek 1000, was thinking about giving that a try. I have many miles on this bike, I have owned it since 95. Last month alone 435 miles and this month, I am at 288 miles. It has been a great bike. I will watch the cartridge bottom bracket. Thanks!

[@keacoq]

I have had trouble with GXP cranksets creaking. I have a 68 mm BB with the two spacers. Bike is 13 yo on its third GXP BB. I read that the left side bearing and spacer if fitted sets the horizontal position of the crank axle. The right side spacer seems less important (and you noted it hindered rotation). I have removed the left side spacer and there is noticeably less creaking. But the lack of left side spacer moved the whole crankset to the right and I had to readjust the derailleurs. But as I write this, I think that it would have been better to remove the right side spacer. That would have the same effect without disturbing derailleur adjustment. thanks for videos. Any tips on GXP creaking would be helpful.....

[@keacoq]

Update: I conclude that the two spacers are necessary with a 68mm wide BB shell, bringing with up to 73 mm. Without them the drive side bearings are not in contact with the shiny part of the axle and the chainwheels are shifted to the right, so altering the chain line. Note that it is the left side bearing that sets the horizontal position of the axle. Still get some creaking, so have not yet found the solution....

[@4166279996]

Hello I have supercycle hooligan mountain bike with 18" frame. Could you tell me what size bottom bracket square taper I need. Thank you

[@The_Original_Truebrit]

On my BB the drive side is metal and my BB toll fits perfect, but the non drive side is plastic, and the toll doesn't fit? Any tips?

[@RJTheBikeGuy]

Shrug. Find the correct tool.

[@bigbuggabear7179]

this mighty be silly, but is there an adapter bottom bracket to convert square tapered to BB30 crankset?

[@johnrichards7847]

Almost certain you need a specific frame for BB 30 as they're press fit check on the gmbn video about them but I don't think they can be made cross compatible

[@653jpk219]

Hi RJ, can you tell the name of the crank arm remover you used? Thank you. Jerry

[@RJTheBikeGuy]

653jpk219 Park Tool Crank Puller: www.amazon.com/exec/obidos/ASIN/B0028YUZSS/ref=nosim/youtube25-20

[@charliearellanos3173]

excellent video ... days ago I installed to same BB GXP for my MTBike but I can see that the side right (I mean side of Crankset) there is a little space between crankset and BB ... my question , Is that normal after to install ? I hope your answer good video .. sorry for my english hehe

[@RJTheBikeGuy]

+Charlie King Yes, it's normal. Is it turning smoothly without play?

[@charliearellanos3173]

Ohh really ?? well...it doesn´t play just at the moment to installed stay that space ... actually my bb is 68mm and only I put one ring of the side right and the side left nothing

[@RJTheBikeGuy]

+Charlie King Maybe I am not understanding. You should be either needing both the spacers or neither. Is it a mountain bike crankset? Then you should need both the spacers with a 68mm shell.

[@charliearellanos3173]

yeah It is for mountain bike crankset ( SRAM X5 2 plates ) so I need put both spacers ?? yesterday I put only one spacer the side right because my crankset stay with that space and also the chain doesnt stay straight

[@RJTheBikeGuy]

Yes, you probably need both. What do you mean the chain doesn't stay straight?

[@hvegat]

This is exactly what I needed!! Thank you a thousand times sir!

[@Silent_Stillness]

Hey again RJ! Do you think that by gauging your effort visually one could approximately reach the 40-45 NM tightening range both when attempting to tighten the BB and the crank arm without a torque wrench? It seemed like you were going pretty hard on the BB and even harder on the crank arm, and that on top of it you were using an extra long tool for leverage... So i'm thinking, if i'm going at both the BB and crank arm "vigorously" with shorter tools but without being a maniac, the risk of over-tightening seems very minimal, if anything wouldn't there be a risk of under-tightening? What's your take on proceeding without a torque wrench?

[@RJTheBikeGuy]

I doubt you can judge torque visually. Hard to say. You want them tight, but if you go too hard you can strip the threads. Not tighten enough, and the parts can come loose.

[@leandro-s9m1r]

Any videos about diferents types of grease and it's uses?. Redgards from Chile!

[@RJTheBikeGuy]

Not really. I use marine grease for pretty much anything involving bearings.

[@pinkpanthersquirrel]

I am upgrading a 1980s Motobecane with a square tape BB in a Sram GXP team English, but the drive side doesn't thread ni completely. It just threads in half way or less. The non-drive side goes in completely. Any suggestion?

[@briananderson4348]

In my case on a Boardman Sport, the drive side crank was removed clockwise and the left side anti clockwise. Also, definitely recommend heavy duty torque wrench to remove. Luckily I have a 60" Torque wrench - would not have got it off without it.

[@musguelha14]

Brian Anderson You shouldn't use torque wrenches for removing stuff.

[@tyson1ize]

it seems a little tight there at the end, should it be a little more free and spin better?? looks like you're only getting about one turn before it stops surely it should spin more than that?? also can I upgrade a vintage road bike the same way??

[@RJTheBikeGuy]

It was very smooth. Yes. The BB was a 68mm/English threaded. That is a very common size even on older road bikes.

[@tyson1ize]

thanks I've learned a lot from you

[@aarcherda1]

hey I have a old peugeot bike and Im want to put a sealed square end bottom bracket, forgive me if I said that wrong but anyways what bottom bracket do you recommend?

[@RJTheBikeGuy]

If it's an old Made in France Peugeot, your options are limited and you will just have to shop around for what you can find. Maybe Velo Orange has one.

[@aarcherda1]

+RJ The Bike Guy alright i found that one on amazon thanks

[@dair805]

What's the main differences between the one you installed and the old one? On what way does it help? Thanks.

[@RJTheBikeGuy]

dair805 Google "advantage of external bearing bottom bracket"

[@tompoh2145]

Love all your wonderful and concise videos, thanks a whole bunch.

[@maxinumarmor]

Can this be done on any MTB I have a [2007-2009 somewhere in that range got it used] Rocky mountain Flare MTB bike ? Want to up grade my crank and bearings to a single sprocket 11 or 12 speed.

[@RJTheBikeGuy]

If you have a square taper BB, you should be able to replace it with a GXP BB.

[@waltp3373]

That is one old-style torque wrench. I've got a couple of those but I mainly use the click type anymore.

[@RJTheBikeGuy]

I own several nice clickers. But I prefer beam torque wrenches for bikes. I like them better for lower torques.

[@gatchaponkei]

I found your videos looking up info on Peugeot bikes. My bottom bracket really needs an overhaul, but I know French bike can be... different. how do I go about identifying what kind of bottom bracket I can install, I'd really like to do an upgrade like this

[@RJTheBikeGuy]

If you have a French made Peugeot with a right hand threaded fixed cup, your options are limited. No GXP for you. You will have to find a French threaded BB or possibly a threadless BB. But I think you will be limited to square taper.

[@gatchaponkei]

maybe I could re thread the frame?

[@RJTheBikeGuy]

Not that I am aware of.

[@jjohnson5014]

What is the benefit of the new bottom bracket? Experience has shown me not to use plastic near moving parts

[@RJTheBikeGuy]

bicycles.stackexchange.com/questions/3197/what-are-the-benefits-of-external-bottom-brackets

[@Dr4g0nW00d]

@rj the bike guy Shimano BB-UN-26 Cartridge Type i have this BB on my MTB now wich BB would you recommend i thought about a shimano hollowtech 2 ??

[@antiprofan]

excellent work,thank you very much and be healthy!!!

[@Swansen03]

i wish i could find it again. it was a sram mtb bottom bracket and there is a bmx bearing that fits perfectly for the OD of an ISIS spindle.. can't remember any of the specific off the top of my head, but, i'll have to dig it up

[@Swansen03]

+Swansen03 ok, figured it out. Hollowtech II external BB fit euro, but spanish bmx bearings will fit the cups and are 19mm ID. ssoo, if anyone has any only howitzer ISIS BBs(long spindles) laying around, cut the spindle out and use this! i used a similar method, but www.biketrial.si/shop/product_info.php?manufacturers_id=14&products_id=286 Profile use to make something similar. basically, just a 128mm spindle with hollowtech II cups and spanish bearings, good to go! www.pinkbike.com/u/philly-bnb/blog/Spanish-in-Euro.html bmxmuseum.com/forums/viewtopic.php?id=204071

[@MiggyManMike]

Have you ever fitted a chain guide to a setup like this ? I've done the same conversion on my own bike (frame is a marin bear valley) but i'm looking at moving from 2x0 to 1x9 and I can't find much in the way of clear information on fitting a chain guide to a gxp bb.

[@RJTheBikeGuy]

I have never used a chain guide. It looks like most chain guides attach to the BB. But I don't think you would want to do that with the GXP. But it looks like there are guides that attach to the seat tube. Check out the "eThirteen XCX". www.amazon.com/exec/obidos/ASIN/B004XIRYOA/ref=nosim/youtube25-20

[@MiggyManMike]

Thanks, that's pretty much the conclusion id arrived at, there's a few people who suggest you can fit some of the bb fit ones but no real details (which is annoying) :)

[@RJTheBikeGuy]

Some installations of the GXP use spacers. I am guessing they are substituting the chain guide for a spacer.

[@MiggyManMike]

That seems to be the case, but again, no details!

[@Skracken]

Late reply and you probably already found a solution. But what I did for a 1x10 conversion was to use a narrow-wide chain ring up front and a clutched rear mech. No chain drops, and no chain slap. Should work well for a 1x9 too!

[@jesuscruz836]

You're the man.... did exactly this with your guidance.

[@Craziestbanana]

right, I don't have a torque wrench but am I right in thinking if I used the corrected weight and measured the distance from the hub I can apply the exact torque to a bolt, ie 12 inch crank wrench (30.5cm), therefore weight required at the end of it to get 40nm would be; 40/((100/30.5)*9.8) = 1.36kg at 12inchs from centre of bolt; so if I poured out 1.36 litres of water into a bottle and hung it from the hub at 12 inches it would check if the bolt is at the right torque right (when at 90* to the floor), because the bolt would barely move right ?

[@ebigarella]

Great! Does this also mean that a Shimano BBR-60 hollowtech could be installed? I mean, GXP and Shimano BB could potentially be installed at the same BB?

[@RJTheBikeGuy]

If you can install a GXP bb, you should be able to installed a Hollowtech II bb. YOu would need matching cranks as the two systems are not compatible.

[@RJTheBikeGuy]

kzbin.info/www/bejne/ipTckoZ7ds18a80

[@ebigarella]

@@RJTheBikeGuy Awesome, thanks! You rock, dude!

[@MrLossavaro]

Parabéns pelo vídeo e também pela clareza da sua explicação.

[@JACON77]

thank you! you just answer my question on mounting a "modern" bottom bracket in an old bottom braket style bike! cheers.... whooo hooo..! haha...

[@lesterpandian2844]

thanks for this video man this is very helpfull i always watching your video here in philippines 😂 thumps up bro

[@brettcrawford7306]

Lester Pandian jnwhsuhco CA crew crew CT by bio

[@emilbaligod1935]

same here from Philippines

[@kaibyo.studio]

What do i need to know if im going to buy a new gxp bottom bracket to replace my old square tapered( for a new crank)

[@RJTheBikeGuy]

+boneeye2 The width and threading of your bottom bracket shell. The most common is 68/73mm and English threading.

[@triskru]

Regarding the use of spacers: it depends on the installed crankset, frametype and the resulting chainline. For MTB cranksets like Shimano Deore XT or similar the optimal chainline is located further apart from the middle of the bike and therefore has to be adjusted with spacers if you have a bottom bracket that measures 68mm. For road type cranksets like 105 the ideal chainline is located nearer to the bikes middle plane. If your road bike frame has a 68mm bottom bracket you dont need to use spacers.

[@RJTheBikeGuy]

This based on SRAM's instructions: kzbin.info/www/bejne/emK4eaeLqcSJaLM

[@JohnnyK2811]

Hey rj. I am absolutely loving your videos. What kind of bottom bracket was the old square one? Was it a shimano bb-un26? If it was this is an upgrade I'm going to do! Is the new one quite tough? I'm wanting to make my bad one that's quite good you see.

[@RJTheBikeGuy]

No, a UN26 usually has a plastic cup on the non drive side. Maybe a UN55.

[@latuman]

How picky is it about what grease you use? I bought "general grease". Viscosity seems the same, it's light brown.

[@RJTheBikeGuy]

+latuman Like automotive grease? For this, it's probably not that important. It's mostly to keep water out and so the parts don't seize up. But if you were using it as a lube for like bearings, then it is more important what grease you use. You would want grease designed to hold up under the heavy use of bearings. And I use marine grease because it doesn't break down when exposed to water.

[@alutious]

my pressfit bb86 on my gravel/road bike, i couldn't see what was happening and I kinked my sleeve so i chucked it. After 5000 miles, alot of rain, I am creaking again for the third time. i am considering going to a "thread together" design. What do you think of 30mm spindles? Mine is a shimano 24mm. What is the mechanical / technical difference? My tiagra 2by 50T is worn so i need to replace that but there aren't too many available. I would also l like to go smaller, like 46T.

[@RJTheBikeGuy]

Sorry, I haven't messed with the pressfit stuff.

[@alutious]

@@RJTheBikeGuy lucky! I do have my old mtb i have fixed up, much of it thanks to you (headset press and cup remover). The bb looks like what you have in this vid, i have to measure it. I like my cranks but i see benefits of a bb. I have tried to use the press on my pressfit bb, it worked but the threaded rod didn't stay in the middle of the axle pathway while pressing. Any ideas how to create a float? I was thinking of maybe smaller washers?

[@aequo5729]

Hi shyflirt1 I have a stiff shimano lockring, have you a good idea for me? i can not losem them with the "normal" bike wrenches. thank you

[@RJTheBikeGuy]

Just the lock ring? The kind with the notches? Set a punch into one of the notches and tap it with a hammer to get it to turn counter clockwise,

[@harv855]

shyflirt1 Yes, a hammer and punch is the "brute force" method, but I made this gorilla lockring wrench by grinding and filing a channel-lock type plier. For best results, clamp down on the lock ring, then tighten the plier pivot nut so that the plier won't open up and slip off. Here is a photo: www.dropbox.com/s/pksx0xvp12thiq0/lockring2.JPG?dl=0

[@RJTheBikeGuy]

Did you try one of these? www.amazon.com/exec/obidos/ASIN/B000C17KRI/ref=nosim/youtube25-20

[@johnhanley9946]

shyflirt1 I have one of these bottom bracket wrenches, and when I first got it the end with three notches was too wide to fit into the notches on the ring. It was on there really tight, and I couldn't get it off, but I solved the problem by giving that end of the wrench a few sharp raps against the garage floor. Now it fits, and the ring came off easily.

[@dodongbustamante9356]

Sir did you change the FD

[@chefe2152]

What about the diameter and lenght of the brackets? Are they all standard?

[@jamesjackson7537]

What size crank spindle is that? Do these hollow techs take 24mm?

[@RJTheBikeGuy]

+James Jackson GXP bottom brackets are made for GXP cranks. Not Hollowtech.

[@jamesmilner301]

Can you fit a triple speed one on that sort of bottom bracket

[@RJTheBikeGuy]

They make triple cranksets for GXP.

[@anzaborrego399]

Thank you. Just excellent instruction!

[@senasplage]

Thank you so much for this video (and all the others), I have been willing to do that for ages, but was put of by that particular replacement. How do you know if your bike is Italian/French or British threaded ? I got a Raleigh AirLite 100 which is a British brand, so my guess is that it will be British threaded.

[@RJTheBikeGuy]

Generally bikes made in France or Italy are the ones you need to worry about. Yours should be English threaded.

[@senasplage]

+RJ The Bike Guy thanks for the comment - Yes prob English threaded.

[@maxinumarmor]

I'm thinking the Giant frames will be the same then? The Canadian one should be standard threads?

[@RJTheBikeGuy]

A Giant should have standard threads.

[@kxlucifer]

RJ The Bike Guy questiom for you i just bought a bike it got those old style cartiage buttom bracket like the bike in your vedio is there any way to make it use a 1 piece mtb crank assembly...im just trying do a low buck bike build.