Our Premium 1X Oval 96BCD traction chainring is designed for Shimano XT M8000 and MT700 1x or 2x cranks Also fits SLX M7000 cranksets. They feature exactly same oval shape as rest of our oval chainring portfolio. Size (Mass +/-1g): 30T (44g), 32T (50g), 34T (60g) Compatibility: Fits only Shimano XT M8000 and MT700 cranksets Material: CNC machined 7075 Txxx Aluminium. Long-lasting construction! Finish: Type II anodizing Mounting holes: 4 x 96mm BCD Asymmetrical design. Use stock bolts. Ovality: Optimized to each size separately. Range: 10.2-14.4% and Timing of 110.5-116.3° after TDC (top dead center) Patent Pending All 3 sizes have built-in standoffs to provide the ideal 1X chainline. Use the stock Shimano M8 chainring bolts that come with crank. Advantages of our special XT M8000 chainrings: *Finest design to provide excellent weight to strength ratio *One of a kind special oval shape (Patent Pending) *Unique Patent Pending narrow-wide teeth profiles to keep your chain in place for minimum 12 months! *Superb quality and great look. *You will ride faster using ovals. If you keep using round ring then others will get quicker. *You will not "feel" the oval shape at all *Reduces stress on knees What size should I choose? * 30T Oval chainring has an ovality of 28/32T and is best for someone who uses currently 28 or 30T round ring. * 32T oval ring will suit best someone who uses 31 or 32T chainring currently. While pedaling, you will feel quite similar effort to the one riding round 31T ring ( the smallest diameter of the oval is 30T), but you will gain the speed similar to riding 33/34T chainring. * 34T Oval chainring has an ovality of 32/36T and is best for someone who uses currently 33 or 34T round ring. How to mount Absoluteblack oval chainring: There is a small mark (triangle shaped) on the inner circumference of the chainring. This mark Must sit behind the crank arm.