Bafang mid-drive motor conversion kits are popular on the market, and many online brands incorporate their technology.
However, there's a strong alternative: the Tongsheng mid-drive motor.
We prefer the Tongsheng for three main reasons: better ride quality, improved efficiency and range, and easier installation.
Riding Experience - Torque vs. Cadence Sensing
The key difference between these motors lies in how they sense pedal input. Bafang uses a cadence sensor to measure how fast the pedals turn.
In contrast, Tongsheng uses a torque sensor to measure how much force the rider applies to the pedals.
Tongsheng mid-drive motors employ a torque sensor, meaning the motor assists based on your pedaling effort rather than just your speed. This results in a more natural and intuitive riding experience.
Bafang's cadence sensing provides a set amount of assistance based on pedaling speed, sometimes resulting in a jerky, on/off feel.
The Tongsheng's torque sensor offers a smoother, more responsive ride as it senses when you're applying extra force and increases its assistance accordingly.
Better Efficiency & Range
Tongsheng mid-drive motors are renowned for their efficiency compared to other types, like hub motors. Their central mounting allows for more efficient power transfer to the drivetrain.
Moreover, a torque sensor helps conserve battery life by only providing power when truly needed. This increased efficiency translates to a longer range on a single charge compared to other motor types.
Easier Installation: Three vs. Six Cables
Both motors are mid-drive, so their physical mounting process is identical. The difference lies in the cables. A significant challenge in eBike conversions is neatly concealing cables. More cables mean more to hide and a potentially less clean-looking bike.
Bafang's speed-sensing system requires additional sensors to detect braking and shifting, while the Tongsheng controller senses the torque you apply to the pedals. When you ease up to shift or brake, it automatically disengages.
Both kits include cables for the battery, speed sensor, display, and optional throttle. However, Bafang requires sensors for brake levers (integrated replacements or add-on sensors, especially for hydraulic brakes). Additionally, a shifting sensor must be threaded through the rear derailleur cable and routed back to the motor.
The Tongsheng wins in the ease of installation category.
A Few Other Things to Consider:
- Durability: Some DIY forums suggest the Bafang is more durable. However, I've personally ridden both on rough trails with plenty of rocks and haven't had any issues with either motor's case.
- Noise: The Tongsheng is slightly quieter, but not enough to be a major deciding factor. Its reduced usage due to torque sensing might make it seem quieter overall.
- Cost: Due to the larger number of Bafang resellers, you might occasionally find slightly better deals. Generally, though, they're priced similarly.
- Speed: The Bafang offers a higher top speed. If that's crucial to you, it might be the better option. If you prefer a more natural feel aligned with legal trail limits, the torque-sensing Tongsheng will smoothly adjust based on your pedal input.
Conclusion
If you prioritize raw speed, heavy hauling, or the potential for slightly increased durability, the Bafang could be a good choice. If you're looking for an easier installation, a more natural and efficient ride, and extended battery life, we wholeheartedly recommend the Tongsheng mid-drive motor.
