Wanted ISO BB to suit a Centaur triple. 120mm—125mm.
- Thread starter Seca Blue
- Start date
walkmanman
Senior Retro Guru
I have a UN91 up on the LFGSS site right now- but what length axle do you need?
https://www.lfgss.com/conversations/395390/
https://www.lfgss.com/conversations/395390/
Hi.
I think I’ve just sprained my thumb scrolling through all that lot you’ve got, strewth.
I ‘think’ that the 91 was specific to the XTR cranks so have updated want to the 90 as it’s to go with a Campag Centaur.
Regarding length I’m coming off a 120 ish which I’d never measured until now. Guess that explains why I used to get some chain line issues!
The spare UN51 I have looks to be 120 ish too so had assumed that would be easy to get elsewhere too. Must say I haven’t a clue about bb’s as the Mavic has never been removed before.
walkmanman
Senior Retro Guru
Yup, well the UN91 is the XTR model so it doesn't surprise me that it's specific to XTR cranks (although Shimano also apparently designed it to optimally work with Dura Ace cranks, too). But hope you can find out the crank length you need. I have a good few Campag BBs so can probably help you in that direction.
Am I right in thinking the taper on all shimano’s is JIS and not ISO? If so they won’t fit well with the Campy cranks anyway will they?
walkmanman
Senior Retro Guru
Sure, well I think some Dura Ace kit is ISO but perhaps only that which works with DA track cranks, as a lot of this track kit was ISO back in the day. But I'm sure my Campag BBs would fit the Campag cranks, unless perhaps the cranks he has are the older MTB specific Centaur and just possibly this was JSA when considering that Campag thumb shifters were set up to work with standard Shimano indexing, instead of the usual Campag cassettes/indexing.
