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I probably know the answer to this is no, but i don't have a BB30 cup to measure/look at vs the 24mm HTII cups that i've got... So is the outer bearing size on a 24 the same as a 30?
It's new crank time, and i'd like something a bit shiny, but they all appear to have over-sized spindles, either 29 or 30mm. I've got a fairly new Wheels Mfg BB in and it pains to think it (the cups at least) will now be redundant..
ta
Can't think of a solution that would work for that problem. Either stick to 24mm cranks or get a new BB with your new cranks.
Would appear not
Hope 24mm spindle bb takes bearing od of 37mm, where my 30mm spindle e13 takes a bearing od of 42mm
What qualifies as a 'shiny' crank? Is XTR not going to cut it?
sui, i think you should get new cranks AND bb and i'll look after the old bb for you.....
cheers
Iain
No you can't I'm afraid but bear in mind 30mm BSA bottom brackets are rubbish, or more to the point, 30mm spindles are a bad idea in bsa shells as there simply isn't enough room.
If you need proof they're a bad idea, even sram, purveyors of GXP, a bar so low its recessed, say the bearing life is unacceptably poor in bsa 30.
Probably got the wrong end of the stick.
These are for putting a 30mm crank into an external BSA24 threaded bottom bracket. Got them on a couple of road frames. Don't have the greatest longevity (the walls are v thin - I think it's normally clumsy diy mechanics that cock it up) reputation but mine have been fine.
Praxis M30 does the same job I think. I have that on one bike with a Praxis 30mm spindle in a threaded BB shell.
Bearing life hasn't been great but I think that's because of the bearings specced (LLB seals for lower friction but I suspect they seal less well), plus I suspect had I popped the seals off and greased before winter they might've been fine.
I can see that the structure is compromised and therefore less strong but not sure I see why it'd increase bearing wear.
If you need proof they’re a bad idea, even sram, purveyors of GXP, a bar so low its recessed, say the bearing life is unacceptably poor in bsa 30.
They only said that to promote their new DUB size of 28.99mm. From my experience my 30mm BB's - RaceFace - have lasted just as long as my Shimano 24mm ones.
Cheers all, I did think there would be someone kind enough to take the old ones of my hands 😉. I was looking at some hopes hence the 30mm spindle, as I want either red or silver cranks, granted my ancient SLXs are almost silver now, but it's bike to work time so treating myself..