Bafang BBS02B 350W-750W Mid-Drive E-Bike Conversion Kit (CAN Bus, 36-52V)

The Bafang BBS02B mid-drive conversion kit (CAN Bus) is the newer-generation version of Bafang's best-selling mid-drive. It uses Bafang's CAN Bus protocol, which lets the motor, display and sensors communicate faster and more reliably, with clearer error reporting. Like every BBS02B, it drives through your bike's gears for strong hill climbing and efficient range. Choose from four power versions, from 350W up to 750W with 120 Nm of torque.

Approximate top speed: 20 to 28 mph (32 to 45 km/h) depending on version (see table below). Speeds are approximate on flat ground with a 26"-29" wheel and depend on battery, gearing, rider weight and terrain. You can also set a lower speed limit in the display.

Display required: choose your CAN Bus display when you order. The display is priced separately, which keeps the kit price lower and lets you pick the one you want. Need the kit without a display? Contact our sales team and we'll help you check out.

Golden Motor is an authorized Bafang reseller. Every kit is backed by our 1-year warranty and our own support team.

Choose Your Power Version

Not sure which wattage you need? Read What Wattage Motor Do I Need?

What's in the Box

• Bafang BBS02B CAN Bus mid-drive motor with built-in controller (your choice of version)
• 46T chainring
• Crank arms (pedals not included)
• Thumb throttle
• Speed sensor and magnet
• All cables, wiring, installation hardware and tools

Display, battery and charger are sold separately. Any 36V, 48V or 52V battery that matches your version works. Shop e-bike batteries.

Compatible CAN Bus Displays

Bafang DP-C010 | Bafang DP-C080

CAN Bus vs UART: Which Should You Choose?

• CAN Bus is Bafang's current system, with faster, more stable communication and better diagnostics.
• UART is the original protocol with the largest aftermarket of displays and DIY programming tools. See the BBS02B UART kit.

Important: CAN Bus and UART parts are not interchangeable. Displays, throttles and sensors must match your motor's protocol.

To change settings, use a Bafang CAN Bus USB programming cable. Our guides: How to Program Bafang CAN Bus and CAN Bus programming without the BESST tool.

Specifications

• Motor type: brushless geared mid-drive, controller built in
• Communication protocol: CAN Bus
• Voltage: 36V, 48V or 52V depending on version
• Rated power: 350W, 500W or 750W
• Max torque: 80 to 120 Nm depending on version
• Max current: 18A to 25A depending on version
• Motor weight: 4.2 kg
• Efficiency: 80% or higher
• Waterproof rating: IP65
• Riding modes: pedal assist (cadence) and throttle
• Bottom bracket fit: 68-73mm. For 100mm or 120mm shells add the BBS02 extension kit. Press-fit frames need an adapter such as the Lekkie BB86/92 or Lekkie PF30.
• Install time: about 1-2 hours with basic tools

Recommended Add-Ons

• Lekkie OneNut or Bafang stabilizer bar to keep the motor tight
• 73mm bottom bracket screws or BB spacers
• Chainrings and cranks
• Bafang parts and accessories

FAQ

Will a BBS02B fit my bike?
It fits most bikes with a standard 68-73mm threaded bottom bracket. See our Bafang fitment guide.

Is it street legal?
The 750W version matches the 750W limit most US states use for e-bikes. See our e-bike law guide.

Can I use my old UART display?
No. A CAN Bus motor needs a CAN Bus display.

Installation Videos

Full step-by-step guide: Bafang Mid-Drive Installation.