Bafang makes the BBS01/02 motor in a 250-watt, 350-watt, and 500-watt mid-drive configuration, but at Electrify Bike Co., we only carry the BBS02 750-watt. Why is that? The 250-watt and 350-watt motors are primarily for countries with e-bike laws limiting the maximum watts to those wattages. In the USA, the e-bike watt limit is 750 watts, so the Bafang BBS02 kit is perfect. For some bikes, customers, and riding conditions where less power is desirable, the 500-watt motor makes more sense. But the 500-watt motor is the same price as the 750-watt motor, and we can configure the 750-watt motor to be a 500-watt motor when needed. A 750-watt motor can become a 500-watt motor when 750 watts is too powerful for the bike or the rider. A 750-watt motor will also last longer when run at the lower wattage.
The BBS02 only comes in a single bottom bracket size. It fits threaded bottom brackets that are 68mm and 73mm wide. If you have a press-fit bottom bracket of this width, we have adapters that can convert your bottom bracket to the threaded standard so the BBS02 can fit. With the new Lekkie adapter, you can also install it on BB86/92. If you have a wider 100mm or 120mm fat bike bottom bracket, you need to use either the Bafang BBSHD or CYC X1 Pro, or X1 Stealth.
The BBS02 is our go-to Bafang mid-drive kit for most bikes and customers. Quiet and powerful, the BBS02 cranks out 120Nm of torque. Compare that to most high-end factory e-bikes with mid-drive motors having torques topping out at 65Nm to 80Nm. It is affordable and fits almost all older bikes and newer bikes that don’t have a wider bottom bracket. It can now fit BB86 and BB92 bottom brackets with the introduction of Lekkie’s new BB86/92 adapter for BBSxx.