Shimano M4100 Deore 10 Speed CassetteReady for shredding the MTB trails, this 10 speed cassette delivers smooth and light performance from its minimal design sprocket carrier. Its three largest sprockets are mounted on a lightweight alloy carrier to reduce weight and increase rigidity. Shimano has also equipped this model with Hyperglide sprockets that have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load. Its close ratio gearing also allows a more efficient use of energy through finer cadence control.Features: Carrier Material: Alloy Use: MTB Speed: 10 speed Compatibile Chain: 10 speed HG-X MTB chains Sprockets: HyperglideTooth Count: 11-46T or 11-42T options available separatelyPart Numbers: 11-46T: CSM4100146; 11-42T:CSM4100142Technologies: Alloy Carrier: The 3 largest sprockets are mounted on a lightweight alloy carrier to reduce weight and increase rigidity. Hyperglide Sprockets: Hyperglide sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load. Sprockets are cut away and drilled to reduce weight without reducing rigidity. Close Ratio: Close ratio gearing allows a more efficient use of energy through finer cadence control.A 2-year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace and XTR products).Buy Shimano Components from Chain Reaction Cycles, the World's Largest Online Bike Store.