shimano bottom bracket 68/70mm question - can you help?

[ti_pin_man]

So I need a slightly longer bottom bracket in my funk as the cranks are too close to the raised chainstays for comfort. Its the recommended 107mm axle length for the cranks, syncros alu ones. Looking for a un91/71 and theres a few 70mm shell ones around but the shell is a 68 I think but I vaguely recall that you can still fit a 70mm shell in, it just sticks out a couple of mm. Right? Its been a while since I installed any BB's. and I don't want to shop for the wrong thing.

 

[Andy B]

70mm is Italian thread and won’t fit as it’s a different diameter & different thread pitch

Maybe you’re thinking of a 73mm bb?

It would sort of work, with as you said the l/h cup sticking out a bit

 

[ti_pin_man]

70mm is Italian thread and won’t fit as it’s a different diameter & different thread pitch

Maybe you’re thinking of a 73mm bb?

It would sort of work, with as you said the l/h cup sticking out a bit

OMG yes you are right and I stand (sit down) corrected. Cool, thank you... off to look for one.