04-19-2011, 03:12 PM
I have a kona smoke and want to upgrade the bottom bracket to a shimano un54.
I removed the original bottom bracket which has no sizes written on it just ch-2n (i think its chin haur).
I measured the shell of the frame which is 68mm and the length of the spindle is 119.7mm.
My problem is that the spindle length doesn't appear to be a standard size the un54 does 118 or 122.5, will any of these work.
I have had a look on the drive side and there is a fair size gap between the crankset and the frame so maybe could go for the 118mm?
the spindle also is asymmetrical and is slightly longer on the drive side will this affect what size i need to order.
sorry for so many questions but this has stumped me as i am a newbie just wish it had been a standard size.
I removed the original bottom bracket which has no sizes written on it just ch-2n (i think its chin haur).
I measured the shell of the frame which is 68mm and the length of the spindle is 119.7mm.
My problem is that the spindle length doesn't appear to be a standard size the un54 does 118 or 122.5, will any of these work.
I have had a look on the drive side and there is a fair size gap between the crankset and the frame so maybe could go for the 118mm?
the spindle also is asymmetrical and is slightly longer on the drive side will this affect what size i need to order.
sorry for so many questions but this has stumped me as i am a newbie just wish it had been a standard size.