Features1Applicable Model: 52T 104 BCD chainring and adapter is compatible for Bafang mid drive motor, can effectively improve the performance of your bike. 2Scope of Application: The 104BCD conversion base can be used with a variety of mountain bike accessories and can be combined with a variety of configuration options for multiple routes, urban traffic. 3Aluminum Alloy Material: The material is aluminum alloy, the hardness is much higher than the original steel sprocket, sturdy and durable. 4Aluminum Alloy CNC Cutting: The 104BCD conversion base adopts aluminum alloy CNC cutting to ensure the accuracy of product use. 5Closely Fitting: Closely fit the original machine hole position with accurate shape and size design, hand feelings are still comfortable.SpecificationItem Type: 52T 104BCDChainring andAdapterMaterial: Aluminum AlloyBCD: 104MMWeight: Approx. 200g / 7.1ozPackage List1 x Chainring Adapter