Bafang Ebike Electric BBS01 BBS02 Bicycle Mid Motor Spider Chain Ring Adapter 104BCD 130BCD for MTB Electric Bicycle<br> <br> Features:<br> brand new and high quality.<br> Conversion base adopts aluminum alloy CNC cutting to ensure the accuracy of product use.<br> Conversion base is perfectly for Bafang Electric bicycle Mid Drive Motor, 36V/48V 250W 350W 450W 500W 750W motor.<br> Conversion base material is aluminum alloy material, hardness is much higher than the original steel chain wheel, strong and durable<br> Conversion base can be used with many accessories for mountain bikes and can be combined with a variety of configuration options, suitable for XC AM DH multiple routes, city commuting.<br> <br> Specifications:<br> A: 5 claws (130BCD)<br> B: 4 claws (104BCD)<br> Color: black<br> Material: aluminum alloy<br> <br> Note:<br> Transition: 1cm=10mm=0.39inch<br> Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.<br> Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you<br> <br> Package Includes:<br> 1 Conversion Base