The Original one and only absoluteBLACK Premium Shimano 12spd Hyperglide compatible Direct mount 1X Oval chainrings in PVD Rainbow (oil slick) colour. Designed for XTR M9100, XT M8100, SLX M7100 & Deore M6100 cranks. Super smooth pedaling experience. This chainring is specifically designed to work with CN-M9100, 8100, 7100 & 6100 Shimano 12spd Hyperglide chain due to different thickness of the teeth. This special PVD Rainbow Titanium coating process makes the chainrings very durable and incredibly beautiful. It is the most Premium oval chainring on the market with scientifically proven performance gains.