1Made of high quality aluminium alloy, which is lightweight and durable to use. 2Ergonomic shape utilizes the stampede acting efficiently to create more stampede traction. 3Suitable for most SHIMANO crankset, fit for AM/XC bicycle. 4The positive tooth corresponding chian tooth is wide, tooth corresponding negative chain is narrow. 5A perfect replacement for bike repair. Our product is made of aluminium alloy, which is lightweight and durable to use. Intensity is more secure, suitable for long time cycling. A perfect replacement for bike repair. Features: 1. Made of high quality aluminium alloy, which is lightweight and durable to use. 2. Ergonomic shape utilizes the stampede acting efficiently to create more stampede traction. 3. Suitable for most SHIMANO crankset, fit for AM/XC bicycle. 4. The positive tooth corresponding chian tooth is wide, tooth corresponding negative chain is narrow. 5. A perfect replacement for bike repair. Specifications: Condition: 100% Brand New Item Type: Chainring Material: Aluminium Alloy Color: Black BCD: 104mm / 4.1inch Weight: Approx. 99-115g Package List: 1 * Bicycle Chainring