Shimano, Ultegra CS-6700, 10sp. cassette, 11-28T, 11-12-13-14-15-17-19-21-24-28 / SHIMANO
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Hyperglide: Fast and Accurate shifting
Wider range gearing: 11-23T, 12-23T, 12-25T, 11-25T, 11-28T
Weight: 209g
10-speed
Alloy sprocket carrier: Lightweight