Features1Reliable Material: The product is made of aluminum alloy; The forging process is adopted to make it not easy to corrode and deform, with strong stability and durability. 2Light Weight: It is designed with light weight, and the chain link is made of alloy structure, which is light but strong; The positive and negative teeth are designed to prevent the chain from falling. 3Product Design: This product adopts safe and effective design and processing integration, with safer strength, and is suitable for long cycle. Its lengthened tooth shape makes the chain rotate better. 4Product Function: The 42T drive ring makes the motor rotate faster and more efficient, especially when users ride on steep slopes. If users want to find a substitute for the original large chain link, this is a better choice. 5Applicable Situation: It is applicable to the electric bike parts or electric bikechain crank group for BAFANG M200, M215, M315, M410, M420, M300.SpecificationItem Type: BAFANG ChainwheelProduct Material: Aluminum alloyWeight: 294.00g/10.37ozSpecification: 42TApplication: Applicable for BAFANG motor M200, M215,M315, M410, M420, M300Package List1 x Chainwheel