Shimano SLX CS-M7100 Cassette The new generation of SLXShowcasing Shimano's new revolutionary HYPERGLIDE+ technology, the new 12-speed SLX CS-M7100 Cassette provides improved shifting efficiency up and down the cassette. Paired with the new Shimano MICROSPLINE freehub, you have an incredibly lightweight package that delivers industry leading performance. The high geared 10-speed cog gives you all the speed you need to sprint to the finsih, and a 51T or 45T low gear allows you to effortless ascend the steepest trails. The 51T cassette pairs with a single ring up front while the 45T cassette is compatible with a single or double chainring up front. Features Wide range and close step 12-speed drivetrain Hyperglide+ Technology Compatible with Microspline freehub Range options: 10-45T, 10-51TShimano Part Number: CS-M7100SPECIFICATIONSSpeeds12Gear Range10-45T10-51TFreehub compatibility Microspline Material Aluminum (51) & Steel (10-12-14-16-18-21-24-28-33-39-45)Weight513g (10-45) , 534g (10-51) | Shimano | Slx Cs-M7100 Cassette 10-45 Tooth