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Shimano XT CS-M771 Bicycle Cassette (10-Speed)
Cog Material: nickel-plated steel
Carrier Material: alloy
Hub Type: Shimano or SRAM compatible
Claimed Weight: 275 g
Recommended Use: mountain biking
It was only a matter of time before Shimano added a cog to its XT-level cassette. The XT Dyna-Sys CS-M771 Cassette utilizes the same Hyperglide tooth and ramp shapes that were so successful in the 9-speed version, to move your chain smoothly across all 10 gears. The XT Dyna-Sys is fabricated from plated steel, which gives you a high performance cassette that doesn't cost a premium. The spiders between the cogs are alloy and the entire 10 gears are secured with an alloy lockring.