Cassette Sprocket, CS-R8101, Ultegra, 12-Speed, 11-30T F25 Connect with the Garmin Explore

Connect with the Garmin Explore app for wireless software updates

Instantaneous push and pull movements

Evaluate your performance indicators to see if you’re training productively3

EnergyCell: A high performance EVA foam that provides shock attenuation

from spring through summer and fall - you'll be a happy camper if you wear your Ferrosi

Cassette Sprocket, CS-R8101, Ultegra, 12-Speed, 11-30T F25 Connect with the Garmin ExploreNew 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