12 Speed Technology - The new Shimano DEORE XT M8100 series features Shimano’s 12-speed versatility while offering superior shifting and braking systems specifically tuned for trail riders. New Shimano DEORE XT delivers unrivalled component customisation and Shimano’s widest range 1x12 gear options with its 12-speed 10-51T cassette. - Hyperglide+ Technology - Inheriting revolutionary HYPERGLIDE+ technology first found on XTR M9100, the DEORE XT M8100 group uses completely redesigned chain plates and shift ramps which guide the chain both up and down the cassette providing faster, smoother shifting in both directions even under incredible pedalling power. - Shimano Deore XT Threaded Bottom Bracket - The shimano deore xt bottom bracket uses high quality sealed bearings and is offered in threaded and pressfit options. - Crank and Chainrings - M8100 HOLLOWTECH II crank construction offers a lighter and stiffer crank design with options for both front single and double chainrings in three Q-factor options, including a Super Boost option (172mm, 178mm, 181mm). Chainrings are easily exchanged with the new direct-mount system and the cranks can be swapped between single and double front chainring setups. All Shimano 12-speed direct mount chainrings are interchangeable. Additionally, Shimano refined chain line specifications for DEORE XT M8100 including a 55mm chain line, ensuring that the drivetrain is optimized for a greater variety of frame designs. - Wide Range and Rhythm Step Cassettes - Enhancing ride performance and expanding gearing range, DEORE XT M8100 cassettes feature SHIMANO’s MICRO SPLINE freehub technology that works seamlessly, allowing the use of 10-tooth cogs. The new design with its smaller splines also allows for an aluminium freehub body construction that isn’t damaged or gouged out by the cogs during use. - Shifters and Levers - With ergonomics focused on comfort and control, the new DEORE XT RAPIDFIRE PLUS shift levers offer light operation force and better rider feedback. Shimano’s I-Spec EV lever design features greater flexibility in mounting while maintaining a clean cockpit. For double chainring systems, the lever simplifies front shifting with a lightweight and compact design that shifts up and down with a single mono lever. - SHIMANO DEORE XT Hydraulic Disc Brake 4-Piston Caliper - The 4-piston SHIMANO DEORE XT hydraulic disc brake ups the stopping power by 10% over the M8000, 2-piston version making it perfect for aggressive trail riding.