Absolute Black Oval 96 BCD Chainring - Asym BCD, 4-Bolt, Requires Hyperglide+ Chain - absoluteBLACK 96 BCD chainrings for Hyperglide greatly improve traction and climbing abilities. They are designed specifically for Shimano XT M8000, SLX M7000 and MT700 1x or 2x cranks. These chainrings will only work with Shimano CN-M9100, 8100 & 7100 Hyperglide chains due to different thickness and shape of the teeth. They are crafted from CNC machined 7075 aluminum, and feature an anodized finish for exceptional durability. Ovality has been optimized for each chainring size, ranging from 10.2 - 14.4% and timing of 110.5-116.3deg after TDC (top dead center). This chainring will only work with Shimano CN-M9100, 8100 & 7100 Hyperglide chains due to different thickness of the teethOval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while ridingProvides excellent weight to strength ratioChainrings have built-in standoffs to provide the ideal 1X chainlineFor 49mm chainlineOnly use the included extra long chainring bolts