BAFANG BBS02B 750W Mid Drive Kit vs Varstrom TSDZ-2B Mid-Drive Motor

The BAFANG BBS02B is the stronger kit on paper: 750W, roughly 100-120 N·m of torque, 9 assist levels and a C18 display, and it is the better pick for heavier riders, hills and light off-road use. The Varstrom TSDZ2B is a 500W, 80 N·m torque-sensing kit that feels more like natural pedaling and suits lighter commuter builds. BAFANG has the larger owner base and more spare parts and firmware knowledge online; the TSDZ2B is simpler and lighter at about 7 kg. Both are DIY mid-drive kits that need mechanical skill to install.

• Choose the BAFANG BBS02B if you want maximum power and torque for hills, cargo or a heavier rider, and you value a big community for parts and tuning.
• Choose the Varstrom TSDZ2B if you want torque-sensing pedal assist that feels like a normal bike and a lighter, simpler install on a 68-73mm bottom bracket.