Shimano M6130 Deore 12Sp Super Boost ChainsetEngineered for maximum performance on every MTB adventure, this single Boost crankset gives you fast acceleration and control on the toughest of rides. It features a robust forged alloy crank arm construction, which makes it more than capable of withstanding all the abuse that's associated with all-day epics in the mountains. Shimano has also kitted out this model with a HollowTech II integrated bottom bracket for increased stiffness, efficiency and added durability.Features: Crank Arm Material: Forged Alloy Chainring Material: Lightweight Aluminium Use: MTB Speed: 12 speed Number of Chainrings: 1 Chainring Included: Yes Chainring Tooth Count: Multiple options available Crank Arm Length: Multiple options available Axle Diameter: Boost Chainline: 56.5mm Chainring BCD: For use with 157mm O.L.D. frames 5 Arm or 4 Arm: 4 arm Chainring Mount: Direct mount Design: 2-piece Dyna-Sys Compatible: Yes Compatibility: 12 speed Dyna-Sys MTB HG-X transmissions Is BB Included: HollowTech II integrated bottom bracketPart Numbers: 30T 170mm: FCM6130C0; 30T 175mm: FCM6130E0; 32T 170mm: FCM6130C2; 32T 175mm: FCM6130E2Technologies: HollowTech II: HollowTech II integrated bottom bracket design uses a wide bearing placement with a large axle diameter for increased stiffness, efficiency and added durability. 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.