Aluminum

Stone Chainring For 12S Shimano M9100 M8100 M7100 Oval 30T 32 34 36 38T 40T Narrow Bike Wide Direct Mount Chainwheel Bicycle Plate Material: Aerospace Aluminum 7075-T651 from Aleris USA Color: black, anodized Speed: 9/10/11/12 Speed Thickness:7MM Hardness: HB150 Chainline:52mm Offset 3mm Fit for: for shimano M9100 M8100 M7100,MT-900 Crank NOTICE: replace the shimano 12 speed chain connector by other brand is a must if your chain is 12 speed, otherwise the shimano 12 speed chain can not work with this chainring. Package Contents: 1 x bike Chainring (Chain Connector need buy seperately) Features: Stone workshop new design wolf tooth narrow wide tooth, enhanced anti chain drop, enhanced self clean from soil dirty and less noise. Advantages: 1 Material: High strength Aluminum 7075-T651. Offer best stiffness and endurance. 2 High precision CNC processing. Working accuracy 0.03mm. Ensure offers you the best riding component. Tooth Max diameter(mm) Weight(g) 30 T , 130 mm , 60 g 32 T , 138 mm , 66 g 34 T , 146 mm , 70 g 36 T , 154 mm , 75 g 38 T , 162 mm , 81 g 40 T , 170 mm , 88 g NOTICE: replace the shimano 12 speed chain connector by other brand is a must if your chain is 12 speed, otherwise the shimano 12 speed chain can not work with this chainring.