crank and bottom bracket queries

hello am in the process of getting together the bits for my fixie project and have got to the crankset, i have a campag crankset and a shimano copy crankset and was wondering about the bott5om bracket lengths, they are both doubles and i will buy the ring for whichever one seems suitable, the frame is either going to be an old road bike or a converted mtb frame, the hubs are on-one track with the cnc sprockets, i have seen the miche bottom bracket, is this adjustable for position? which taper is it? jis or iso?
thanks
cf
thanks
cf
0
Posts
Marv
Trek 8000 ZR XC hardtail.
Don't quite see what you mean there. The required length of the BB axle is dependent wholly on the chainset and the required chainline, which in itself depends on the hub.
However you are right in saying that you can't decide on the BB before you choose the frame because you buy a bottom bracket for the correct shell width, but with the axle length to suit your chainset and chainline.
Ta Cf
Thanks again
Cf
David
thanks for that i was wondering about an old campag daytona chainset and miche bb on a road frame i've got spare.