Classic & Vintage - BB size for Bianchi steel frame with Campy 10 speed

Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.



PDA
-holiday76
02-10-09, 02:21 PM
I'm converting a steel mid 80's bianchi to run a Campy 10sp drivetrain. I'm going to run a Chorus double crank and and cold set the rear spacing to fit the rear dropouts for a centaur 10 speed cog. It's currently set at 126mm spacing.
Can someone tell me how to figure out what size bb I need? Or maybe someone can just tell me?

It's a italian bb shell and I was going to pick up a 70x111 veloce cartridge unit, but I thought i'd ask first before I end up with a part I can't use..

ALSo, if I later go with a compact crank can I use the same BB?

lotek
02-10-09, 02:34 PM
Record and Chorus use a smaller BB width (102mm) than the 111mm centaur or veloce bottom bracket.
-holiday76
02-10-09, 02:37 PM
ok, so this needs a 102mm? Just wanted to make sure because I'm not exactly sure how old it is, or if maybe the older ones still used 102

http://i19.ebayimg.com/03/i/001/2e/3b/ae08_1.JPG

-holiday76
02-10-09, 02:41 PM
the chorus BB is $92 where as the Veloce one is $37. Damn. If I do indeed need a 102 is there someone else that makes a 102, italian thread, for cheaper than $92?

or better yet, is the chorus crank compatible with any of the older style square taper bb's? Can I use any old 102mm square taper bb?
lotek
02-10-09, 02:44 PM
I'm not sure about compatability between the chorus cranks and older square taper BBs.
I'd ask that in the Mechanics forum.
lotek
02-10-09, 02:48 PM
Total Cycling has the Chorus bottom bracket for $58.