SRAM PG 1070 Cassette Whether you're riding a Red, Force, or Rival-equipped bike, the "PowerGlide" shifting of PG-1070 will provide crisp, positive shifting under any circumstance -- a mellow spin, or at max power on a steep climb. Unlike Dura-Ace and Record, the PG-1070 weighs in at a scant 220g without having to resort to easily-worn titanium cogs. Rather, the PG-1070 is made from durable heat-treated steel, giving you tons of mileage before you'll need to replace it. The PG-1070 is available in several ratios: 11/23, 11/25, 11/26, 11/28, 12/25, 12/26, and 12/27. Its spline configuration allows it to fit on any Shimano 9/10-speed freehub, and it's compatible with any 10-speed chain: SRAM, Shimano, or Wippermann's S-series chains. What SRAM suggests, of course, is that you use one of their 10-speed PC-1000 series chains for optimal shifting. Includes a forged, anodized, and laser-etched lockring. The actual weight of the SRAM PG-1070 Cassette:� - The 11-23 includes- 11,12,13,14,15,16,17,19,21,23 - 194g
- The 11-25 includes- 11,12,13,14,15,17,19,21,23,25 - 224g
- The 11-26 includes- 11,12,13,14,15,17,19,21,23,26 - 220g
- The 11-28 includes- 11,12,13,14,15,17,19,22,25,28 - 239g
- The 12-25 includes- 12,13,14,15,16,17,19,21,23,25 - 229g
- The 12-26 includes- 12,13,14,15,16,17,19,21,23,26 - 237g
- The 12-27 includes- 12,13,14,15,16,17,19,21,24,27 - 237g
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