Shimano MT510 12 Speed Single MTB ChainsetReady to heighten your mountain biking riding experience, this crankset offers fast acceleration and smooth performance. It features an incredibly tough forged alloy crank arm construction, which gives it excellent strength as you take on every challenge. Shimano has also equipped this version with a HollowTech II integrated bottom bracket, so you can benefit from its increased stiffness, efficiency and additional durability.Features: Crank Arm Material: Forged Alloy Use: MTB Speed: 12 speed Design: 2-piece design Crank Arm Length: Multiple sizes available Chainline: 52mm Frame Compatibility: For use with 142 /148mm O.L.D. frames 5 Arm or 4 Arm: 4 arm Chainring Size: Multiple sizes available Chain Compatibility: For use with 12-speed HG MTB chains only Is BB Included: HollowTech II integrated bottom bracket Is Chainring Included: Yes Part Numbers: 34T 170mm: FCMT510C4; 32T 175mm: FCMT510E2; 30T 170mm: FCMT510C0; 34T 175mm: FCMT510E4; 32T 170mm: FCMT510C2; 30T 175mm: FCMT510E0Technologies: 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.