Each chainring can be disassembled, which is convenient for replacement and reduces maintenance costs. Crank and Chainring Made of aluminum alloy, light weight, stylish, high axial strength and compatibility. Internal weight reduction design makes the crank weight lighter and will not add burden to your riding. Compatible with most mountain bikes and dirt bicycles. Made from ultra-lightweight aluminium alloy, it is extremely sturdy and easy to assemble, Manufacturer: ZXDGsdrdtW