Applicable Model: 104BCD 34T conversion base is perfectly compatible for Tongsheng electric bicycle mid drive motor. Item Type: 104BCD Sprocket Adapter. 1 x 104BCD Sprocket Adapter. Scope of Application: 104 BCD 34T chainring fits 7, 8, 9, 10, 11 speeds chainring, can effectively improve the performance of your bike.
