Bicycle Mechanics - BB for my Cannondale

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cipU

05-13-08, 04:02 AM

Hi.
I have a Cannondale R700 1997 with Shimano 105 Crank
After having some noise from teh crank/bb area i reoved the crank and the BB
The BB is a Shimano BB-UN52 68 BC1,37x24

Whemn i look at webpages for a replacement i have the option for

Shimano compatible. 251g. (68x107mm). Specify Model: 68x107, 68x110, 68x113 or 68x115mm.

witch one to get?

cipU

05-13-08, 04:44 AM

Found out mesself ;-)

bikeman715

05-13-08, 08:16 AM

messure the axle with a ruler . my guess would be like a 113 mm should do it.

cipU

05-19-08, 02:01 AM

infact it was a 107
.... i am wondering ... i like this bike a lot .. and would like to upgrade it it has 105 and ultegra now
from 1996 with lots of miles on salty west norwegian roads .. if i buy a new ultegra sl .... does the new BB have to be a 68/107?

bikeman715

05-19-08, 11:32 AM

yes with your question , but if you are going with new stuff (08) then it will be external cup and bearing units. then the axle would be longer .