There's a difference between Hollowtech I and Hollowtech II (octalink vs external bb). They'll fit your freak bike just fine. If you want to be a weight weenie and look up the weights go to weightweenies.starbike.com and look at the listings... If you want the lightest crankset possible there are other alternatives....digitalayon said:I ahve a Hollowtech XT crankset that I'd like to have on my 29er project. However I would like the lightest one possible. Would a XTR fit it? What are my options? Google sucks for this kind of thing.
Forgot that was the title of the thread!mtnbiker72 said:There is also a difference between XTR and XT in Hollowtech I bottom brackets. XTR used the Octalink V1 pattern splines (same as Shimano road cranksets). XT used the Octalink V2 pattern splines.
So they can't use the same bottom bracket