• The hole which has to be increased in size (rather than drilled from scratch) is the one underneath the BB. It has to be increased in size not in order to get the cables in and out but in order to get the junction box in and out, so the size of the cables isn't really the limiting factor. The sub-BB hole does have to be increased slightly but, as the Cervelo notes say, not by much.

About

Avatar for Brommers @Brommers started