Shimano XT M8000 MTB Crankset - BoostWith some major updates over its previous models, the XT M8000 crankset is now manufactured from better quality materials and adopts technologies that used to be reserved for Shimano’s top-end XTR range. This means you’ll be able to attack the trails even more aggressively, safe in the knowledge that your drivetrain will back you up. Shimano XT Boost Compatible CranksetLightweight and durable, this XT mountain bike crankset is ready to give you the reliability and consistent power delivery you need to quickly power up to speed and to conquer steep climbs. This particular model is also “Boost” compatible as it has a longer spindle for use with bikes with the wider 148mm spacing. Features:Material: Forged HollowTech II Aluminium Axle/Spindle Size: 24mm (for use with Hollowtech II systems) Bolt Circle Diameter: 4x10mm Shimano asymmetric design Speed: 11-speed Chainline: 3mm outboard chain line (53.4mm) for use with 148mm rear axle width (boost) Lightweight construction for external super smooth bottom bracket bearings For use with 11-speed Dyna-Sys DCE single chainrings (not included) For use with 11-speed HG-X MTB chainsStiffness and strength increased with advanced design due to wider spaced bearings and oversized axle70° spider arm for optimal rigidity Bottom bracket not included Please Note: Chainring not included Manufacturer Reference Code: 170mm: FCM8000BC; 175mm: FCM8000BE Weight: 698g (175mm, excluding BB, with a 36T chainring fitted)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.