Features： 1、Made of aluminium alloy, which is lightweight and durable to use. 2、Ergonomic shape utilizes the stampede acting efficiently to create more stampede traction. 3、Compatible with M6000/M7000/ M8000 / M9000 Series Cranks. 4、The positive tooth corresponding chian tooth is wide, tooth corresponding negative chain is narrow. 5、A replacement for bike repair. Specification： Our product is made of aluminium alloy, which is lightweight and durable to use. Intensity is more secure, appply for long time cycling. A replacement for bike repair.    Features: 1. Made of aluminium alloy, which is lightweight and durable to use. 2. Ergonomic shape utilizes the stampede acting efficiently to create more stampede traction. 3. Compatible for M6000/M7000/ M8000 / M9000 Series Cranks. 4. The positive tooth corresponding chian tooth is wide, tooth corresponding negative chain is narrow. 5. A replacement for bike repair.   Specification: Item Type: Chainring Material: Aluminium Alloy BCD: 96 mm / 3.8 in Diameter: 32T: 13.5 cm / 5.3 in, 34T: 14.5 cm / 5.7in,  36T: 15 cm / 5.9 in,  38T: 16 cm / 6.3 in   Weight: Approx. 60 - 88 g / 2.1 - 3.1 oz Package list: 1 * Bicycle Chainring Note : Compatible for M6000 20   speed tooth tray,not c ompatible for M6000 30  speed tooth tray . Package List：