Replacement bearings for all Crupi & Rhythm hubs.
#6900 bearing fits all model Rhythm front hubs (2 bearings for front hubs) + the 1 center bearing in Original Rhythm rear hub. Also fits inner drive side and 2 in the cassette body of the Section Mini/Expert hub. For a complete set of hub bearings, you would need 5 total
#6000 bearing fits all Original Rhythm rear 28H & 36H hubs (4 total) + 1 non-drive end in Rhythm Section Mini/Expert rear hub
#6001 bearing fits Rhythm Section Pro36 rear hub (4 total for rear)