How To Service And Install A Press Fit MTB Bottom Bracket | Mountain Bike Maintenance
How To Service And Install A Press Fit MTB Bottom Bracket | Mountain Bike Maintenance


– There’s nothing more annoying than a creaking mountain bike. One of the things that can
cause creaks are loose bolts, another worn out bushes,
sometimes even a dry chain. Today, we’re going to be looking at the press-fit bottom bracket. Press-fit bottom brackets,
while simple and effective, can be prone to creaking in the long term. This is how you cure that. The biggest cause of
creaking bottom brackets with a press-fit design
tends to be the fact that it’s not been installed correctly. It’s absolutely essential that
the bearings are completely flush with the frame and
in line with each other. Any slight movement or
deviation can lead to creaking. There are two types of
press-fit bottom bracket: high-end alloy options
or the common nylon unit. Blake’s bike’s got a nylon
Shimano bottom bracket in here, and we’re going to
simply remove that today and reinstall it,
showing you why it creaks and how to stop it. Before we get started removing the bottom bracket from the bike, make sure you check everything
else around the crank area. Check your crank bolts, chain ring bolts, and if you’ve got a design
where the spider mounts onto the back of the crank,
check that it’s tight. They’re all likely
candidates for creaking. For this job, as we’re
working on a Shimano setup, you need a five millimetre
Allen key to remove the cranks; a Shimano crank tool;
grease, carbon compound or an assembly compound;
bottom bracket rocket tool; bottom bracket installation
press; and a mallet. First things first is removing
the cranks from the bike. First you need a five millimetre
Allen key, or hex wrench, and a Shimano bottom bracket tool. Away we go! So firstly, I’m doing these
five millimetre pinch bolts. These just secure the crank onto the axle. Now using the Park Tool
crank removal tool, there’s a little thumb
wheel on the end here. That’s for removing the pre-loading cap. So, you just locate that into the end of the crank and remove this. This works in the same way
as a Headsettop cap does, it just pre-loads the bearings just to make sure there’s no play. With the Shimano crank
like this, once it’s loose, you can technically take
the crank straight off. You may need to give it just
a little tap with a mallet. Make sure you use the protective end so you don’t damage the crank. Next step is to remove
the drive side crank. Because this is Shimano,
you need to make sure the clutch is off. Notice on Blake’s bike it already is. Remove the chain and
then pull the crank off. So, I’m just going to swing
the lower cage forward, remove the chain, now it’s a case of just
tapping out the axle. And there we go. So this is the Park Tool’s bottom bracket bearing removal tool. I call this the rocket tool because original Headset Tools
were very similar to this, only a lot bigger, and
named the rocket tool. Reason for that is you insert it into the bottom bracket itself, these sprung wings
locate behind the bearing so you can safely put even pressure on the back of the cup. You tap it out using the
metal end of the hammer. Just make sure it doesn’t
fire out across the workshop and under somewhere you’re not going to be able to retrieve it. So, slide the tool straight through, have to give it a little tug
until it locates with a snap. There we go. So, you can feel that’s home
against the back of the cup. Now give this a few firm
taps with the metal end. There we go. So, now you have the
left-hand side of the cup out. It’s the same process for the drive-side. Make sure when you pull this out that the tool stays aligned
on the back of the cup. So, with both cups removed from the bike, you want to clean and inspect these looking for signs of damage. This one on Blake’s bike just looks dusty and dry, to be
honest, and a bit gunky. So, going to give it a complete clean. And the same with the
bottom bracket shell itself. If you can see it inside of here, there’s bits of sand and residue from all the dry riding he’s been doing. Make sure it’s completely
clean before you reinstall. Just cleaning out the
inside of this shell, making sure the surfaces are free of any sort of grit and any muck. So, when you instal a
press-fit bottom bracket, the best way to do it,
the official way to do it, is by using a dedicated
bearing press like this. The reason for that is
you can’t mess it up. You basically push the bearings in and they’re perfectly aligned. A lot of your friends might tell you you can do it with a block
of wood and a mallet, and you can but you’re
never going to be sure that the bearings will be in straight. And that is exactly what leads to a creaking bottom bracket. Depending if you’re
installing your bottom bracket into an alloy or a carbon shell, it affects if you use
a grease or a compound. So, with the alloy shell,
you probably want to use a small amount of grease
but don’t go overboard because overtime the nylon bottom bracket can deform slightly and move, and that’s what causes
those annoying creaks. If you’re unsure about
that, you can also use a anti-seize compound, any
sort of gripping compound. And that stops it moving. For carbon, you shouldn’t
really be using grease because grease is said to weaken the inside of carbon shells. It’s not too much of
an issue to run it dry, but I would recommend using some kind of anti-creak compound. There’s various ones on the
market, so look into that. Just to show you how the bottom
bracket press tool works, what you do is find
the correct spacer that fits your particular bottom bracket. In any of these sort of
kits, you’ll get a number of these type of spacers. That goes straight onto the tool first. Then your first cup would go on and locate onto that spacer. Then you would put the tool into the frame and then repeat on the other side. Before finishing would be the end cup. Then you simply close
this and it squashes it into the frame. So, as you’re tightening
the bearing press, make sure that the bearings are completely flush and in line. You don’t want it going
in at a slight angle, otherwise you’re never going
to get right of that creak. Now it’s the case of just
reinstalling your cranks and making sure all
the bolts are nipped up to the crank taut setting. Then it’s a case of hitting the trails and hoping you’ve got rid of that creak. Now that you got your bottom bracket back in the bike, you’re ready to ride. Hopefully it’s good. If it’s not and it is still creaking and you can’t identify what it is, more than likely, the nylon bb’s still is moving slightly in the frame. If that’s the case,
you can get around this temporarily by using a
sleeve-retaining compound. It acts kind of like a thread lock. It’s a temporary thing
but if your bottom bracket is still in working
condition, it’s worth doing. Don’t forget to subscribe
by clicking right here. If you want to learn a bit more about a full clean and
service on your bike, click down here. If you want to learn about how to keep your whole bike creak free, click up here. Give us a thumbs up if you like the video.

89 thoughts on “How To Service And Install A Press Fit MTB Bottom Bracket | Mountain Bike Maintenance”

  1. Dan278 says:

    Press Fit is the worst! never gonna buy a Bike with Press fit again. But good video, really like the new presenter.

  2. TheMegaMrMe says:

    I think tech videos are better with you on board! PS: how often should I clean my bottom bracket ?

  3. Jordan Keeler says:

    Great job on your first mechanical video Doddy!

  4. Antoine Leroy says:

    Blake getting a free BB service by Doddy, lucky Bing Bong !

  5. Leo Pohl says:

    Doddy, you're quite tall 😮

  6. Emi S says:

    A tip that might help when removing the cranks: you should loosen the bolts evenly, otherwise one gets loose and the other gets extremy tight, so better slowly each one a bit at a time.

  7. Helmut Breuer says:

    video comes to the right time,guys. my new bike with pressfit bb will arrive in two weeks. great job,doddy

  8. Vaios M says:

    you got me thinking about press fit vs threaded bb. what is better? (a question for ask gmbn plz)

  9. Torchedini says:

    Best way to prevent BB creak, don't buy press fit BB.

    BB30 is stiffer but crank options are not there.

  10. Joe Milnes says:

    How to replace a headset? #askgmbn

  11. Julien Jones says:

    BB30 soon ?

  12. Galicano Siton says:

    Theres should be a plastic plate between the pinch bolts that hinders you to punch the arm out?

  13. L3o 16 says:

    #ASKGMBN We will be driving to Sweden this year with the car and I want to take my bike and my brothers bike with me. We will drive more than 20 hours. How can I Protect the bikes from any damage and rain ? (The bikes are on a bike stand for cars)

  14. Volker Schäfer says:

    Can you make a vid on HOLO TEC bottom bracket

  15. Seb O says:

    can anyone subscribe to me because I want
    50 subscribers before my birthday please(I am only 10 ) subscribe to me and I will sub back

  16. newt says:

    doddy knows what hes talking about, but he has no personality. Put me straight to sleep.

  17. DownhillDobson says:

    Nice vid dodo😊

  18. Yves Laingui says:

    great vid maybe worth wearing a diffrent colour shirt in the workshop?😂

  19. Rune Uthaug says:

    Good video.

  20. William Keys says:

    This video was long overdue. Thanks for posting.

  21. ThunderStruckCoach says:

    I always fix a creaky PFBB by buying a new frame with a threaded BB……. Works every single time.

  22. Christopher Knight says:

    Can't believe they fired Scotty for not knowing the difference between a manual and a wheelie.
    Also, I like how you emphasized the fact that Blake has the common low end version rather than high end lol, take that Blake

  23. Mark Evans says:

    Doddy !!! Cool man you know whats what …

  24. baggyroo10 says:

    P ractically
    R eplace
    E verything
    S eals
    S hims
    F rame
    I want
    T hreaded
    👀

  25. Ben Breakwell says:

    The amount of times he said "compound", i think there needs to be a compound counter

  26. Erik Schmidt says:

    pressfit simple and effective? how about cheap and useless? its just a way to save money for the bike company…the ones you can just screw in were alot easier to handle

  27. toasty bear says:

    Doddy's brilliant at this 🙂

  28. Arqom Noval says:

    we would like to see Doddy shred some trails 😁

  29. Joe Tasler says:

    Awesome video Doddy!!

  30. Snapper2015 says:

    Hey guys,
    I have a problem:

    I just bought a new xt chain, and the Dartmoor simple chain keeper,
    The problem is the chain keeper just tensions the chin downside, so at woody sections, the chain just pops at first teeth out of sprocket, so when I crank forwards, it pops just right out. The sprocket looks ok, at some teeth a bit sharp, cause of the slipping.
    Any suggestions to get more tension or without buying a new chain guide ?

    Thanks, Greetings from Germany!

  31. Newt Tella says:

    good video. but should mention to viewers about the plastic piece between the left crank arm pinch bolts, it needs to flip up before the crank can come off. Really looking forward to more tech videos by Doddy!

  32. Horsey ! says:

    #askGMBN Where does Doddy come from? Like is he a pro bike mechanic or a racer?

  33. moist_flange says:

    ive had issues for bloody months with my BB (ISIS) absolute shite had to get an upgrade… luckily on warranty!

  34. Machiavelli_ G says:

    nice watch!

  35. Moto Guro says:

    Hope GMBN give me a mtb for free. im always tuning in to GMBN videos but sad i dont have an mtb.

  36. braking falied says:

    the last laugh is gooood😎

  37. ibanez2010 says:

    I've never owned a bike with a press fit BB. Is there any advantage to these over threaded in bearing cups?

  38. Jose Rene Ducharme says:

    Very well explained by an obviously very competent rider.

  39. Raúl Goa says:

    Very well explained!
    Thanks

  40. Charles Holland says:

    nice video!

  41. Felix grandgirard says:

    how do you do to find out what press fit bb your bike's instaled with? i've looked everywere on the bb and on the bike's spec list but nothing…

  42. Neven says:

    nice vid, helped me alot!

  43. Youssef O. says:

    hey guys !! i need your help and get an advice from yu experts as you can see im a newbie here and i wanna buy a Mbike !! i live in belgium and i have a low budget from 450 tot 500 euro and i wanna buy a Mbike for crosscountry !! im in front of 2 choices teh first is an (Cube aim pro 2017) and the second is an (Orbea Mx50 2017) whish one tne best do you think ? and should i have a 27.5" bike or 29" size wheel ?? thanks for responding as soon as possible !! (Note: pls don't advice me to pick a SCOTT ihave no enougth money to pick an expensive bike ! )

  44. AudioLlama says:

    For those not wanting to splash out for a rather pricey bearing press tool, I made my own fairly similar to this:
    http://forums.mtbr.com/drivetrain-shifters-derailleurs-cranks/diy-bearing-cup-press-tool-%245-press-fit-bottom-bracket-pics-922442.html
    Might isn't even as good or refined as that and it works pretty nicely.

  45. enduro trucker Ernie Desjardins says:

    I don't think I'm a fan of press fit bb . good old threaded for me. if it ain't broke don't change it. my Norco 250 is press fit and I totally hate that bb.

  46. gouki27 says:

    So clear and informative thanks Doddy.

  47. bitumen83 says:

    Probably 1 of the worst inventions in biking world…press-fit BB

  48. Oreo Carlton says:

    how to fix? sell frame. buy threaded. done.

  49. KennyMinigun says:

    You forgot to undo the safety plastic in the left crank arm. Actually, by using that mallet you might have damaged it.

  50. pro mod steve says:

    Doddy really comes across calm and professional in his instructions. Great presenter.

  51. Duncan Alexander says:

    first you need $300 of tools. the end XD good video though

  52. Armin Hess says:

    Doddy forgot to explain the function of the lttle plastic lip on the left crank. He had to lift it up before removing the crank with the mallet. No big thing but essential.

  53. Allu Allunen says:

    boring guy Scotty is better

  54. Alan Dougan says:

    dry riding!! yeeeooooo!

  55. Rasmus Wallin says:

    What are the Parktools you use

  56. Ben Hensley says:

    Wow, thats not as bad as I thought, same with your servicing your forks video. Thanks Doddy, I'm slowly growing in confidence to do more of my own maintenance. Hopefully that'll help me enjoy the riding time even more! Cheers, Ben

  57. cher yee says:

    Just put the BB in fridge over night b4 installation… he's method is wrong

  58. Rixter says:

    Great video. Can you show how to replace the bearings in your rear hub?

  59. Craig Jervis says:

    You're not supposed to reuse Shimano pressfit bearings.

  60. ichiroku says:

    only doddy can work on drivetrain related components in a white shirt and still rival the pope in cleanliness afterwards

  61. Crispus Antoninus says:

    Name of background music?

  62. Marc Stucki says:

    What is Doddy doing exactly with the Allen key on the far side of the bike when pressing in the BB?

  63. Clay Colehouse says:

    Hopefully this solves my problem. I actually have the same bike lol

  64. 5davi5 says:

    Press-fit BB's are shit.

  65. sultanabran1 says:

    threaded bb are better

  66. Hugh Chadwick says:

    I used a headset press to install the BB bearings into the frame of my Fat bike. Worked a treat :-)!

  67. StanleyGoldbrik says:

    Clear, concise and to the point. Thanks!

  68. DansGarageProjects says:

    Taking DIY to extreme levels 5:13.

  69. Mountain Bear outdoors says:

    I don't understand press fit, is it just cheaper than having threaded bb shells? been watching a lot of GMBN videos its nice to see the old MBUK guys .

  70. ernesto aguirre says:

    hi, can somebody tell me what is the name of the Red aluminum part that says  GENIUS 22 30Tthat looks like a cover to keep the frame from any damage with the chain…. TKS

  71. RollinRat says:

    Your best option is to repair the BB, then sell your frame to some fool who doesnt know any better.
    Press fit BBs are incredibly under engineered, over marketed crap!! They WILL become NOISY and or suffer an premature demise. Its all due to improper manufacturing processes for the precise tolerances required to install bearings. Practically NO BIKE COMPANY machines their bearing bores!!!
    Machining is the only way to precisely size the hole where the bearing goes. Why dont they?It is very expensive! Oh! Is your frame expensive?!?!

    READ A MACHINERY HANDBOOK! Tolerances for bearings are in tenths of thousandths of an inch!!!
    There is NOTHING wrong with threaded standards. Its a proven standard ! I never have problems with these bottom brackets unless theyre worn out or neglected. Ive never ridden a noisy new bike with a threaded BB!! Ive ridden many brand new $5K + bikes, with P/F that creaked! Right off the showroom floor.

  72. RollinRat says:

    Do you ever wonder why many companies have returned to threaded standards?

  73. anonymous says:

    27.5 bike?

  74. adamcrookedsmile says:

    at 6:00 any pointers on how hard to tighten the bottom bracket installer tool? As hard as it goes or just until it sits firmly?

  75. vince milliau says:

    Is there a way to get the plastic ring off without the tool ? 1:50

  76. Jacob Nunez says:

    that genius is purdy

  77. Javier Chavez Import Bike says:

    Scotty,What would you recommend to remove a stuck PF bottom bracket?

  78. Richard Wolf says:

    I was sceptical of press fit BB's til I got my Trek Stache with a press fit. Just replaced one after 2 years and probably around 5 to 6 thousand miles.
    I have to laugh when people say that threaded BB's are so much better. Well they creaked a shit load too! Headsets have used press fits for ever. And with threaded BB's you can get BB's to seize so bad that you can't remove them.

  79. Dartht33bagger says:

    Links to the tools used in this video would be extremely helpful.

  80. Andrea Rota says:

    Nice watch, isn't it?

  81. Andrea Rota says:

    Once removed you have to replace with a brand new one or cleaning and reassembling is just fine?

  82. DingbatToast says:

    Thanks Doddy! this really helped 🙂

  83. Tomi Saaranen says:

    Our cat apparently wants to know how to service a pressfit BB, because he started this video while I left my phone on the bed 🙄

  84. dan san says:

    shimano anti seize vs. carbon paste (mucoff) on a carbon frame with pressfit bb – good idea?

  85. Till O'Mann says:

    In my case the pedals were creaky.

  86. Joe Filar says:

    What is an anti-creak compound for carbon frames? Not fiber grip, right? Wheels Manuf recommends dry or a compatible grease for carbon BB shells. Thanks.

  87. Endo Alley says:

    Will one tool work for removal of both 30mm and 24mm spindle?

  88. SuperWasweissichdenn says:

    I have a BB like this on my CX bike it comes loose on a regular basis though i got both frame and several expensive BBs new. This is a total bullshit system if it does not even work on a CX bike then i don´t even want to try a MTB with pressfit BBs. Even in my LBS they told me that theyhave nothing but problems with these most people buying a bike with pressfit BBs come back to them pretty soon because it either creeks or comes loose and deforms. I won´t be buying any frame using one of these anymore for sure.

  89. Alex says:

    I have installed a new press fit BB from shimano (XTR level) into my alloy frame with the help of one of those dedicated press tools and used some amount of Lactite 648 retaining compound to stop it from moving and creaking. I rode my bike only two days later, so there were plenty of time for the retaining compound to dry. It didn't help, however. The bike is creakier than it was. It creaks when I pedal under load, but also when the bike is standing and I put pressure on it by leaning on it from above. And it does not matter if I lean onto the saddle or onto the top frame tube. I am now wondering, what if I bought an expensive metallic BB such as Token Ninja which threads together, spend about 100 euros and the BB would still creak. Looks like there is no panacea from those creaks at all. Thinking about selling the bike and building a new one myself with a threaded BB…

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