Featuring the award-winning technology of other Sram cassettes in the Transmission range, the XS-1270 Eagle cassette delivers exceptional performance for even more riders. With its unique nickel chrome finish, this quiet and durable cassette has a replaceable sprocket block. And for the first time on a traditional flanged cassette body, it offers a 10-52 tooth range thanks to the integration of the 10-tooth sprocket and lock nut.Product advantages: Extended range: 10-52 teeth. 8-12 sprockets (10-12-14-16-18 teeth) in the form of a replaceable block. Compatible with a 55 mm chain line for a less pronounced chain angle, improved wear resistance, and increased precision. Adjustment sprocket for easy installation. Compatible with 8, 9, and 10-speed (HG) freehub bodies. Approved for aluminum and steel freehub bodies for use on mountain bikes and e-MTBs. Unique X-Sync technology for the best gear changes under full load, both inward and outward. Unique black chrome nickel finish. Compatibility: all Sram T-Type components.Details: Model: CS-XS-1270-A1. Speed: 12 speeds. Technology: XS. Sprocket finish: black. Freewheel body: 8, 9, 10-speed splined. Transmission type: 1x. Chain type: T-Type. Gear spacing (10-52 teeth): 10, 12, 14, 16, 18, 21, 24, 28, 32, 38, 44, 52 teeth.Part numbers: 00.2418.141.001: XS-1270 Eagle T-Type Cassette, 10-52T, 12-speed.