Shimano M6100 Deore 12 Speed Single ChainsetThis 12 speed crankset is engineered for fast and fun MTB riding, as it gives you fast and acceleration and smooth performance as you blast across the mountain. It features a hard-wearing and forged alloy crank arm construction, which makes it more than capable of handling all the abuse that's associated with all-day epics in the mountains. Shimano has also equipped this model with a lightweight aluminium single chainring for the ultimate strength to weight balance.Features: Crank Arm Material: Forged Alloy Chainring Material: Lightweight Aluminium Use: MTB Speed: 12 speedSingle or Double Chainring: Single Tooth Count: 30T or 32T options available separately Length: 170mm or 175mm options available separately Bottom Bracket Design: HollowTech II integrated bottom bracket Compatibility: Shimano 12speed Dyna-Sys MTB HG-X transmissions Chainline: 52mm chain line for use with 135 /142 mm O.L.D. frames Chainring Mount: Direct mount 2-speed Dyna-Sys Compatible: Yes Part Numbers: 30T 175mm: FCM6100E0; 32T 170mm: FCM6100C2; 32T 175mm: FCM6100E2 and 30T 170mm: FCM6100C0A 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.