Cassette Sprocket, CS-R8101, Ultegra, 12-Speed, 11-30T Hats Giant Training Wheels Set suitable

Giant Training Wheels Set suitable for 16-20" bicycles with fixing hardware included

Double layered for maximum warmth

The Paddle Bag could carry two-piece paddles from 210 to 230cm

4 EXTENDED BATTERY LIFE

Need something not too big or small

Cassette Sprocket, CS-R8101, Ultegra, 12-Speed, 11-30T Hats Giant Training Wheels Set suitableNew 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