Wheels Manufacturing BSA Bottom Bracket - Shimano Hollowtech II Spindle ABEC 3 Blue 21mm Base / Climbing Zone: Protec

Base / Climbing Zone: Protec / Twin Skin Mohair Mix (K51116)

and breathable 3D mesh fabric

the boot is perfectly wrapping your foot

Made with the perfect flex for the best kick in classic

Standard Chainline 49mm for 28-34t

Wheels Manufacturing BSA Bottom Bracket - Shimano Hollowtech II Spindle ABEC 3 Blue 21mm Base / Climbing Zone: ProtecWheels Manufacturing BSA Bottom Bracket Shimano Hollowtech II Spindle ABEC 3 Blue. Wheels MFG BSA Bottom Brackets for frames that accept English (BSA) threaded bottom brackets TECH SPECS Bottom Bracket Shell I. D. 1. 37 BB Frame Interface English BB Shell Width (mm) 68 BB Shell Width (mm) 73 Weight 105 Spindle Interface Type Shimano Hollowtech II Spindle Interface Type RaceFace EXI Spindle Interface Type FSA MegaExo Defined Color Blue