Features1Well Fitted: The sprocket adapter can be compatible for bafang electric bike central drive motors BBS01 and BBS02. workmanship makes the adapter fit the motor well. 2Durable: The motor bike gear adapter is made of aluminum alloy, and the hardness is much higher than that of the original steel sprocket, which is firm and durable. 3High Accuracy: The bike mid motor adapter adopts aluminum alloy CNC cutting to ensure the accuracy of the product, so as to improve the performance. 4Easy to Install: The motor bike gear adapter is small in size, simple in structure, easy to install and disassemble, and can directly replace the original or damaged adapter. 5Lightweight: The chainring spider adapter is light in weight, and will not increase the weight of the bike after installation, so as to avoid affecting the speed of the bike.SpecificationItem Type: Motor bike gear adapterMaterial: Aluminium alloyWeight: Approx. 205g/7.2ozBCD: 104MMApplicability: 7, 8, 9, 10, 11 speedPackage List1 xMotorBikeGearAdapter