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bb size?
NB: Originally posted elsewhere on the Global Riders Network and appears via syndication.
Hi, looking at converting my 2014 giant xtc advanced 29er 1 to 1x10, I want to run some new race face cranks. What bb do
I have. I think I need 92?
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It's a standard shimano pressfit BB for Mtb. There is a 71 in there ATM, which is XT and the 91 supposedly has better seals and is the xtr version. No idea if your raceface cranks will be shimano compatible - it's far easier to get a frank that uses the same BB becuse removing a pressfit bb is a pain and destroys the BB in the process.
Thanks for the reply, gives me something to think about
Thanks for the reply, gives me something to think about
Good luck with the Bottom Brackets's I think its the biggest MTB nightmare. Been down this road twice already. There is pretty much zero standard for Bottom Brackets. As far as I know, not every frame is compatible with every crank due to Bottom Bracket specifications. This is because certain Bike brands will partner up with certain Bike part brands and frames are often designed to work with specific cranks. Like Giant uses Shimano. Your options can often be limited.
I think it is a BB86 width, most BB86 will work as a BB92 and vice versa. I used a Wheels Manufacturing one(great value for money)and it just overlaps a bit more if used on an 86 frame.
As to ruining them when removing a pressfit BB I can't see why, I've had mine out three times and it is OK.
If you need to buy a crankset you want a 68-73mm width spindle, BB86 is the same overall width as a 68mm BB with external bearings.