Bafang 104bcd conversion base adopts CNC cutting of aluminum alloy to ensure the accuracy of product use The Bafang 104bcd conversion base is perfectly compatible with the Bafang electric bicycle medium transmission engine, v / 36V / 48V 250W 350W 450W 500W 750W motor Bafang 104bcd the conversion base material is aluminum alloy material, the hardness is much higher than the original, strong and durable steel chain wheel. The Bafang 104bcd conversion base can be used with many mountain bike accessories and can be combined with a variety of configuration options, suitable for XC AM DH multiple routes, city trip Category: Cogwheel Plate tooth: 34-42T Use: Mountain bikes Use: Road bikes Use: Children's bicycles Use: For BMX Model Number: crankset for bafang mid motor kit 104BCD: 4 Chain Ring Bolts 104BCD Weight: 40g colour:black Material:Aluminum Alloy size:about 170mm Package Contents: 1 * adapter plate 4 * M5*16 screws Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.