36V 48V 350W 500W Controller Conversion Kit for Bafang Hub Motor, Ebike Controller Kit with Torque Bottom Bracket, LCD Display & Full Accessories

36V 48V 350W 500W Controller Conversion Kit for Bafang Hub Motor

This complete ebike conversion kit is specially engineered to work with Bafang hub motors. The 36V / 48V controller supports 350W and 500W hub motors, delivering stable power output for smooth pedal assist riding. Built with 9 MOSFETs and max 22±1A current, the silver aluminum controller features an XT60 power connector for reliable battery connection.

The kit comes with a torque sensing bottom bracket SR PA231.32.ST, compatible with 68mm and 73mm bottom bracket shells. The torque sensor detects your pedaling force in real time to activate natural pedal assist. You can choose either 38T or 44T chainring to match your riding terrain.

Compatibility

✅ Voltage: DC 36V / 48V

✅ Support Motor Power: 350W / 500W Bafang hub motor

✅ Bottom Bracket Shell: 68mm / 73mm

✅ Chainring Option: 38T / 44T

Core Parameters

Package Includes

1 × Ebike Controller (36V/48V, 22A)

1 × LCD Display (Optional)

1 × Torque Sensing Bottom Bracket SR PA231.32.ST

1 × Chainring (38T or 44T optional)

1 pair × Crank Arms

1 × Thumb Throttle

1 pair × E-brake Levers

1 × Main Wiring Harness

1 × Installation Wrench & All Fitting Accessories

Key Features

✅ Stable Controller Performance: 9 MOSFET design, max 22±1A output, works with 36V/48V battery and 350W/500W Bafang hub motor. XT60 connector ensures secure power connection.

✅ Torque Sensing System: SR PA231.32.ST torque bottom bracket fits 68mm /73mm frame shells. Real-time pedaling force detection provides natural, responsive pedal assist.

✅ Dual Chainring Options: 38T and 44T chainrings available. 38T for hill climbing; 44T for higher speed on flat roads.

✅ Multi-function LCD Display: Clearly shows speed, battery level, assist level and other ride data for real-time monitoring.

✅ Full Set of Accessories: Complete retrofit package including throttle, e-brake levers, wiring harness and installation tools. Everything needed for DIY ebike assembly.

✅ Dual Light Output: Built-in 6V output for front light and tail/brake light, convenient for night riding.

✅ Multiple Wiring Ports: EB BUS, Torque 6PIN, Motor 9PIN ports for simple wiring and reliable signal transmission.

Specifications

• Applicable Motor: Bafang 350W / 500W hub motor
• Controller Voltage: 36V / 48V DC
• Max Current: 22±1A
• Mosfet Quantity: 9 pcs
• Power Connector: XT60
• Controller Color: Silver
• Torque BB Model: SR PA231.32.ST
• BB Compatibility: 68mm /73mm bottom bracket shell
• Chainring: Optional 38T /44T
• Package Contents: Full conversion kit as listed above

Important Notes

• Please confirm your battery voltage (36V or 48V) and chainring selection before placing the order.
• Verify your bicycle bottom bracket shell width (68mm or73mm) to confirm fitment.
• This kit is designed for Bafang 350W /500W hub motors only. Not compatible with other brand motors by default.
• Minor color difference may exist due to screen and lighting.
• Mechanical measurement tolerance is allowed.
• Only items listed in package includes are covered.

Perfect for DIY ebike builders and bicycle repair shops. Upgrade your existing Bafang hub motor bike to torque sensing pedal assist with this all-in-one conversion kit.