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Product Description The XTR 12-speed Cassette CS-M9101 by Shimano - XC or Enduro gradation? The Shimano XTR 12-speed cassette CS-M9101, the plastic spacer, which minimises noise, is firmly glued to the rear and is not included separately as with the predecessor CS-M9100. This model is still available in two versions: 10-45 T for cross-country racers where every gram counts and even gradation is desired, and 10-51 T for trail and enduro riders who need a wide range and want to excel on the steepest ramps. Shimano calls the first version " Rhythm Step" , the second " Wide Range" . All CS-M9101 cassettes are made of three different materials - steel, titanium and aluminium. They are only compatible with the Shimano Micro Spline freehub body. Groundbreaking Hyperglide+ technology not only ensures super-fast gear switching, but also allows you to continue pedalling even while shifting. Guidelines for Replacing E-bike Components:Before you replace components on your e-bike, please read through the guidelines for component replacement for CE-marked e-bikes/pedelecs with pedal assistance. Specifications:Application:Cross Country, EnduroGearing:12-speedGradation:10-45, 10-51Sprocket Material:steel, titanium, aluminiumFreehub Compatibility:Shimano Micro SplineTechnical Information:Series:XTR M9100Spider:1 (aluminium)Recommended Chain:HG 12-speed (e.g. CN-M9100)Compatibility:12-speed Micro Spline: Shifter:SL-M9100-R, SL-M9100-IR, SL-M8100-R, SL-M8100-IR, SL-M7100-R, SL-M7100-IR, SL-M6100-R, SL-M6100-IR, SW-M8150-R, SW-M8150-IR, ST-RX820, ST-RX610Rear Derailleur: 1x12-speed with 10-51 t: RD-M9100-SGS, RD-M8100-SGS, RD-M7100-SGS, RD-M6100-SGS, RD-M8150-12, RD-RX822-SGS1x12-speed with 10-45 t: RD-M9100-GS, RD-M9120-SGS, RD-M8100-GS, RD-M8120-SGS, RD-M7120-SGS, RD-RX822-GS2x12-speed with 10-45 T: RD-M9120-SGS, RD-M8120-SGS, RD-M7120-SGSChain:CN-M9100, CN-M8100, CN-M7100, CN-M6100E-bike Drivetrain:EP8 EP800, STEPS E8000 / E8080 with 1x12-speed rear derailleurFeatures:10-51: Wide-Range version with 510% coverage10-45: Rhythm Step version with 450% coveragebetter acceleration due to lower moment of inertia and weight of beam spider constructionfaster shifting, no interruption of the pedal strokeMicro Spline construction for engagement of the freehub body1 to 4 sprockets made of steel, 5 to 9 out of titanium, 10 to 12 out of aluminiumanodised sprocket carrier and lockringTechnology:Hyperglide+ / HG+ Hyperglide+ is the efficient further development of the Hyperglide system by Shimano. These are shifting aids and specially shaped sprocket teeth that make shifting to larger or smaller sprockets suppler, smoother and quieter. The system of small rivets attached to the side of the sprocket and milled or pressed-in ramps ensures that the chain is already carried along by the next sprocket during the shifting process before it leaves the previous sprocket. Hyperglide+ is optimised for faster shifting and shifting under load and has a more efficient chain connection, holding power and power transfer when combined with a compatible HG chain. Compared to Hyperglide, the shifting time is reduced by one third and the pedal stroke is noticeably reduced. HG+ enables a completely new chain stability and thus offers a safe riding experience. Micro Spline Micro Spline is an innovative tooth profile on MTB freehub bodies from Shimano. All Shimano 12-speed MTB cassettes with a 10-tooth sprocket are equipped with Micro Spline freehub toothing. The significantly higher and finer toothing enables a stiffer connection between the cassette and the hub body. The resulting increased contact area ensures reliable power transmission, minimises wear and prevents deformation of the freehub and sprocket. Models:10-45: Gradation:10-12-14-16-18-21-24-28-32-36-40-45 tManufacturer Number:I-CSM9101045 10-51: Gradation:10-12-14-16-18-21-24-28-33-39-45-51 tManufacturer Number:I-CSM9101051Contents:1 x Shimano XTR CS-M9101-12 cassette1 x Shimano aluminium lockring Weight: silver-black | 10-45: 357 g silver-black | 10-51: 367 g Manufacturer: Shimano Europe B.V. High Tech Campus 92 5656 AG Eindhoven Netherlands info@shimano-eu.com