buddha
Veteran
I've just switched a PowerSpline-BB/Isoflow-Crankset to Square Taper. Not knowing any better I just ordered the same size BB (68x113) as the cranks recommend a 112.5mm BB axle.
However, on installing there is a difference of around 10mm between left/right cranks and the chainstays - around 25/15mm, drive/non-drive side respectively. Also the middle ring is pretty close the the drive side chainstay. I put a 1.5mm washer between the BB and frame to give a better chainline (though this obviously makes the difference between cranks worse).
Should I get a 68x118 or 68x122mm BB, or is there something else I should know?
thanks, buddha
However, on installing there is a difference of around 10mm between left/right cranks and the chainstays - around 25/15mm, drive/non-drive side respectively. Also the middle ring is pretty close the the drive side chainstay. I put a 1.5mm washer between the BB and frame to give a better chainline (though this obviously makes the difference between cranks worse).
Should I get a 68x118 or 68x122mm BB, or is there something else I should know?
thanks, buddha