QS Motor QSD128A‑60 is a 72V PMSM natural‑cooled mid‑drive motor. Rated power 2500W, peak power up to 5200W.
Equipped with high‑precision encoder and KTY83‑122 thermistor sensor, it delivers accurate rotor position feedback and real‑time temperature monitoring for smooth closed‑loop control.
Compact and lightweight design with IP67 protection grade. It supports short‑time overload at twice rated power, balancing strong acceleration and good driving range.
Package Includes
1 × QSD128A‑60 2500W mid‑drive motor with encoder
1 × 428‑15T sprocket (17‑14‑6‑4)
Key Advantages
– Precision encoder feedback
Encoder provides accurate rotor position signal, cooperating with KTY83‑122 thermistor for real‑time temperature monitoring. It realizes smooth torque output and overheat protection for better riding controllability.
– Strong short‑time overload performance
Supports 2× rated‑power short‑time overload, delivers 5200W peak power and 58N·m peak torque for great acceleration and climbing performance.
– High efficiency & low power loss
Peak efficiency over 93%, reduces power consumption and extends battery range.
– Light‑weight compact structure
Only 6.92 kg net weight. Mid‑mount layout optimizes vehicle weight distribution and saves installation space for most modified frames.
– IP67 waterproof & Class‑F insulation
Reliable performance under rainy, muddy and various outdoor riding conditions.
– Customizable parameters available
We can offer customized performance specification after confirming voltage, torque and current parameters for your project.
Application Scope
This QS motor mid‑drive motor is widely applied for street e‑motorcycles, light‑weight e‑dirt bikes, high‑speed converted e‑motorbikes and high‑performance e‑bikes.
It fits DIY hobbyists, modification workshops, EV assemblers and aftermarket parts dealers.
For individual users: city daily commuting, recreational riding and light off‑road use.
For business clients: small‑batch vehicle development and powertrain retrofitting projects.
