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 optimized for MTB use, which improves chain retention. The high-precision design of the chainring also increases the efficiency, smoothness, and quietness of the drivetrain. Specifications: Application: Enduro, All Mountain, Cross Country, Downhill Mount: Shimano Direct Mount Teeth: 28 T, 30 T, 32 T, 34 T, 36 T Gearing: 1x12-speed Technical Information: Chainline: 52 mm, 56.5 mm Material: aluminum, carbon (CFRP), steel Compatibility: XT FC-M8100-1 XT FC-M8120-1 XT FC-M8130-1 Features: stronger chain binding for better chain guidance special tooth profile developed for MTBs more even riding in rough terrain aluminum arms (anodized), 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 chain retention and counteracts chain drop on rough ground. It also minimizes wear and increases pedaling efficiency. Manufacturer Numbers: 28 tooth: I-SMCRM85Z8 30 tooth: I-SMCRM85A0 32 tooth: I-SMCRM85A2 34 tooth: I-SMCRM85A4 36 tooth: I-SMCRM85A6 Contents: 1 x Shimano XT SM-CRM85 chainring Manufacturer: Shimano Europe B.V. High Tech Campus 92 5656 AG Eindhoven Netherlands [email protected]