Tooth size: 32T / 135mm, chain size: standard 1/2 " x 1/8 ", shape: round, suitable for different types of bicycle cranks with 104mm vest Material: Made of high quality anodic oxidation 7075 T6 aluminum alloy, aerospace resistance. 4mm thick rigid plate to prevent sagging. CNC precision process: precision machining and anodic oxidation plating, medals smooth surface, bright color, not faded and corrosion resistance. Wide and narrow teeth: The wide and narrow teeth greatly increase the contact area with the chain, so that each of the teeth can be fully inserted into the chain, ensuring the ultimate chain retention, increasing the service life and reducing friction and noise. Compatible Model: Fits most SHIMANO and SRAM cranks. Please carefully determine the specifications of your BCD crank before purchasing Product description Specification Material: 7075 T6 aluminum alloy Shape: round Size: 32T, 34T, 36T, 38T Compatibility: speed 9/10/11 tBCD: 104BCD Weight: 41 g (32 t) / 49 g (34 t) / 59 g (36 t) / 72 g (38 t) Scope of delivery: 1 x tray Functionality: 1. The new wide and narrow tooth design increases chain retention, service life, and reduces friction and noise. 2.Super durable and lightweight 3. Easy to install and perfectly fits the 104mm bolt pattern. Installation note: This chainring is suitable for 9/10/11, not for xt M8000 Please carefully determine the specifications of your BCD crank before purchasing.