Shimano M6100 12 Speed CranksetEngineered for fast and fun MTB riding, the Shimano M6100 12 Speed Crankset gives you quick acceleration and smooth performance as you blast across the mountain. This crankset features a 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 kitted out this model with a lightweight aluminium single chainring for the ultimate strength to weight balance.Features: Material: Crank Arm: Forged Alloy; Chainring: Lightweight Aluminium Use: MTB Speed: 12 speed Single or Double Chainring: Single 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 mountTechnologies:Hollowtech II: The addition of Hollowtech II technology integrates the bottom bracket axle with the right crankarm for more stiffness and weight savings to achieve a high-dimensional balance. Its outboard bottom bracket bearing system provides better weight distribution and more pedalling stability, allowing for more efficient power transfer. The Hollowtech II crankset has been developed by pursuing the optimum balance of stiffness & rotating performance in a lightweight and beautiful crankset design. Moreover, Hollowtech II crankset has a high-precision sealing in the bearing area to increase durability maintaining the excellent rotating performance for long periods.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.