what size BB?

[stew-b]

i need to get a BB for a 1988 cannondale with xt m730 biopace chainset,no idea what length i need though :?

 

[Bikeshopowner]

68/122.5, All Cannondales are 68mm shells, and Biopace chainsets (in fact nearly all with non-compact rings) are 122.5

 

[stew-b]

thanks