Shimano Ultegra CS-6600 10SP Cassette

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Shimano Ultegra CassetteUltegra offers smooth shifting and light weight. To achieve this the larger cogs are mounted to an aluminum carrier. A wide variety of gearing options let you choose just the right combo for your ride. Shimano-patented ramps and tooth profiles ensure effortless shifting. Compatible with both Ultegra or Dura-Ace 10 speed cassette bodies, as well as 9 speed 105, Ultegra, Dura-Ace, and most other 9 speed cassette bodies Requires Shimano super-narrow 10 speed chain Weight: 235 grams (12-23T) Compatibility: 10 speed Shimano drivetrains Sizes11-23 (11,12,13,14,15,16,17,19,21,23)12-23 (12,13,14,15,16,17,18,19,21,23)12-25 (12,13,14,15,16,17,19,21,23,25)12-27 (12,13,14,15,16,17,19,21,24,27)Junior gearing13-25 (13,14,15,16,17,18,19,21,23,25)14-25 (14,15,16,17,18,19,20,21,23,25)15-25 (15,16,17,18,19,20,21,22,23,25)