The SRAM PG-1070 10spd Road Cassette is is light, strong and durable. SRAM's PowerGlide technology keeps your gear changes fast and smooth for quiet, reliable shifting mile after mile. semi-spidered design maintains a high level of shifting performance with a matched cassette/chain combination that runs near silent. To help you in the toughest climbs it is now available in the new 11-32 ratio. Please be sure to replace your chain as well to prevent injury due to chain slippage under power.