Bicycle Mechanics - crank rubs bb shell. whats up?

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Otto Rax

08-18-08, 09:09 AM

I got a new frame with a TA bottom bracket, and a buddy gave me a TA crank. the left side fits fine and has room to spare, but the drive side goes on and touches the bottom bracket, so if i tighten the arm on, it won't even turn. if i swap them (drive on left, non on right) everything fits great and lines up, but its all backwards. do i need to flip my axle or did i do somethign wrong?

HillRider

08-18-08, 09:35 AM

It soundl ike you need to reverse the axle. I've seen a couple of bikes where the bottom bracket was installed "backwards" intentionally and by design to get proper clearance on both the drive and non-drive side with the chosen crank. The axle doesn't care which way it rotates so install it the way that works best.

Sturmcrow

08-18-08, 10:54 AM

Peter White says that TA changed their Carmina cranks in 2007 such that they now need a ~6mm longer axle. Check towards the bottom 1/3 of this page.

http://www.peterwhitecycles.com/bottombrackets.asp