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