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 perfect replacement for bike repair. Our product is made of aluminium alloy, which is lightweight and durable to use. Intensity is more secure, appply for long time cycling. A perfect 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 perfect replacement for bike repair. Specification: Condition: 100% Brand New 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 compatible for M6000 30 speed tooth tray.