Ultegra BB72-41B Press-Fit Bottom Bracket Vendor_Problem Solvers These training wheels feature new

These training wheels feature new frame adapters that improve installation

Cassette Body Type: Threaded Standard 1

Your front wheel's quick-release skewer clamps onto the Hogg body and off you go

Crown Race Seat Dia

SCM 415 hardened chromoly steel

Ultegra BB72-41B Press-Fit Bottom Bracket Vendor_Problem Solvers These training wheels feature newShimano's Ultegra bottom bracket uses Pro Tour proven technology for lighter weight and super smooth spinning, while still maintaining the same level of durability and stiffness. It's available in English, Italian, or Press Fit models. New seal construction for smoother rotation BB Shell Width (mm): 68 mm BB Frame Interface: BB86 Bottom Bracket Shell I. D.: 41 Defined Color: Black Weight: 69 g Spindle Interface Type: Shimano Hollowtech II