Specifications Hign-concerned Chemical:None Type:MTB Bike Freewheel is_customized:No Model Number:CS-M9100-12 Sensitivity:108 Sounds Flywheel Adjustable Gear Number:11-Speed Material:Alloy Gear Teeth:11T Freewheel Speed:10 Origin:Jp(origin) Components:Freewheel Note:There are 3 different options showed on the pictures for you to choose.Please check carefully before purchasing! Option 1 CN-M9100 Option 2 CS-M9101 10-51TUpdated version of CS-M9100 Option 3 M9100 CN+CS51T Set XTR 12-Speed MTB Cassette Sprocket CS-M9100-12 XTR - 12-Speed - HYPERGLIDE+ - MTB Cassette Sprocket With its BEAM SPIDER construction, the XTR M9100 12-speed cassette shaves weight while increasing SHIMANO's MTB gearing range another gear. Using SHIMANO's new MICRO SPLINE freehub body and HYPERGLIDE+ tooth profile, these 10-45 and 10-51T cassettes deliver the best MTB shift experience on offer. FEATURES Definitive shifting Let you pedal continuously while shifting Increased acceleration by reducing inertia and weight by BEAM SPIDER construction New MICRO SPLINE * construction to engage FREEHUB body PRODUCT SPECIFICATIONS MODEL NOCS-M9100-12 SERIESXTR M9100 Series Average weight357 (10-45T) 367 (10-51T) TypeHYPERGLIDE+ Rear speeds12 Compatible chainHG 12-speed Combination name (Group name)10-45T 10-51T Combination * Titanium gear|110-12-14-16-18-21-24-28-32-36-40-45T | 10-12-14-16-18-21-24-28-33-39-45-51T Spline type|MICRO SPLINE Aluminum spider arm|QTY (pcs)1 Titanium gear|QTY (pcs)5 Aluminum gear|QTY (pcs)3 Steel gear|QTY (pcs)4 TECHNOLOGIES MicroSpline hyperglide XTR 12-Speed MTB Chain CN-M9100 XTR - 12-Speed - HYPERGLIDE+ - SIL-TEC - MTB Chain Designed for SHIMANO's revolutionary XTR M9100 12-speed MTB groupset, the M9100 chain provides enhanced chain retention thanks to an extended portion of the inner plate. The new chain features quick-link assembly and SIL-TEC treatment for extended offroad durability. FEATURES Smoother driving even over bumpy terrain Greater chain retention to extend portion on the end of inner plate to firmly hold the tooth both front and cassette sprocket Enhancements to shifting performance Compatible with new generation of drivetrain QUICK-LINK (SM-CN910-12) Easy connect Quick assembly tool also available Non-reusable QUICK-LINK connecting & removing pliers (TL-CN10) PRODUCT SPECIFICATIONS MODEL NOCN-M9100 SERIESXTR M9100 Series Average weight242 RemarksQUICK-LINK TypeHG 12-speed E-BIKE rear derailleur system compatible Pin link plateSIL-TEC Roller link plateChromizing RollerSIL-TEC Chromizing treatment roller link pin Hollow pin TECHNOLOGIES sil_tec hg