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Even during maximal efforts up a climb or racing, riders no longer need to back off to shift. In any gear, Ultegra R8150 drivetrains maximize efficiency thanks to larger cogs and retain compatibility with existing Hyperglide freehub bodies. All this while increasing to 12-gears, Ultegra R8100 Bicycle Cassette are the new paradigm in road shifting.
|Manufacturer part #||ICSR810012130||ICSR810012134|