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. _x000D_ _x000D_ Features:_x000D_ 1. Made of high quality aluminium alloy, which is lightweight and durable to use._x000D_ 2. Ergonomic shape utilizes the stampede acting efficiently to create more stampede traction._x000D_ 3. Suitable for most SHIMANO crankset, fit for AM/XC bicycle. _x000D_ 4. The positive tooth corresponding chian tooth is wide, tooth corresponding negative chain is narrow. _x000D_ 5. A perfect replacement for bike repair. _x000D_ _x000D_ Specifications:_x000D_ Condition: Brand New_x000D_ Item Type: Chainring_x000D_ Material: Aluminium Alloy_x000D_ Color: Black_x000D_ Optional Style: 40T, 42T_x000D_ BCD: 104mm / 4.1inch_x000D_ Weight: Approx. 99-115g_x000D_ _x000D_ Package List:_x000D_ 1 * Bicycle Chainring 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.