Cassette Sprocket, CS-R8101, Ultegra, 12-Speed, 11-30T la sportiva Thanks to the universal compatibility

Thanks to the universal compatibility of Croakies' Spec ends

Weighs 960g (Regular) or 1

Also works very well as a base preparation wax

Heart rate training helps you train more efficiently and effectively

Cassette Sprocket, CS-R8101, Ultegra, 12-Speed, 11-30T la sportiva Thanks to the universal compatibilityNew tooth profile designed to work with both electronic and mechanical Shimano drivetrains. Tooth profile slightly changed to better accomodate mechanical shifting For Di2 and Mechanical Shifting Systems Refined 12 step gear combination provides peak efficiency and accelerating performance for every racing situation Faster, smoother shifts under maximum pedaling force Compatible with new 12 speed (HG Spline L2) and road 11 speed (HG 11) freehub bodies