CS-R8101-12 / CS-R8100-12 Random shipment Parts Detail: 1.CS-R8101-12 --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 and road 11-speed FREE...
CS-R8101-12 / CS-R8100-12 Random shipment Parts Detail: 1.CS-R8101-12 --Refined 12 step gear combination provides peak efficiency and accelerating performance for every racing situation --Faster, smoother shifts under maximum pedaling force ...