105 CS-R7101 12spd Cassette

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From sprinting on the flats to climbing steep inclines, the 11-34T cassette has you covered. It is compatible with both SHIMANO 11-speed and 12-speed FREEHUB bodies. Refined 12-ste p gear combination provides peak efficiency and accelerating performance for every situation Compatible with new 12-speed and road 11-speed FREEHUB body Show more