Shimano XT M8100 12 Speed ChainringDesigned for tackling tough mountain bike (MTB) trails, this 12 Speed Chainring from Shimano features an optimised gear tooth profile which improves chain engagement and retention. It also benefits from a durable and lightweight aluminium construction, so you can enjoy long-lasting performance, without adding unnecessary weight.Features:Material: AluminiumUse: Mountain Bike (MTB)Series: XT M8100Speed: 12 speedArm: 4-armMount: Direct MountCompatible Chain: CN-M8100 12 speedCompatible Crankset: FC-M8100-1, FC-M8120-1 and FC-M8130-1Part No: SM-CRM85Technologies:Dynamic Chain Engagement+: Dynamic Chain Engagement+ is a special gear teeth profile designed for use in single-chainring configurations for cross-country (XC), enduro, and trail riding. It gives more chain retention and smoother pedalling - even over bumpy terrain. Chain retention of any gear will reduce abrasion and worn out.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.