Product Description Shimano XT FC-M8100-1 12-speed chainring - high precision finished tooth profile The Shimano XT chainring SM-CRM85 features Dynamic Chain Engagement+ technology. This is a tooth profile optimised for MTB use, which improves chain hold. The high-precision design of the chainring also increases the efficiency, smoothness and quietness of the drivetrain. Specifications:Application:Enduro, All Mountain, Cross Country, DownhillMount:Shimano Direct MountTeeth:28 T, 30 T, 32 T, 34 T, 36 TGearing:1x12-speedTechnical Information:Chainline:52 mm, 56.5 mmMaterial:aluminium, carbon (CFRP), steelCompatibility:XT FC-M8100-1XT FC-M8120-1XT FC-M8130-1Features:stronger chain binding for better chain guidancespecial tooth profile developed for MTBsmore even riding in rough terrainaluminium arms (anodised), CFRP body, steel teeth (painted)Technology:Dynamic Chain Engagement+ Dynamic Chain Engagement+ is Shimano's term for a special tooth profile of single chainrings intended for off-road use. This improves the chain hold and counteracts chain drop on rough ground. It also minimises wear and increases pedaling efficiency. Manufacturer Numbers:28 tooth:I-SMCRM85Z830 tooth:I-SMCRM85A032 tooth:I-SMCRM85A234 tooth:I-SMCRM85A436 tooth:I-SMCRM85A6Contents:1 x Shimano XT SM-CRM85 chainring Manufacturer: Shimano Europe B.V. High Tech Campus 92 5656 AG Eindhoven Netherlands info@shimano-eu.com