
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.
QS138 90H 4000W Mid-Drive Motor Electric Power Train Complete Kit
Amazon.com Price: $1,627.50 (as of 18/07/2025 00:35 PST- Details) Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.
High torque output: amplified torque through gear reduction, suitable for steep slopes, mountains and other complex terrain
Modularized design: motor, controller and sensor are highly integrated, and the parts can be replaced separately during maintenance.
Compatible with a wide range of vehicles: can match vehicles with different wheel diameters and tire types.
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With Pulley ,With Sprocket |
Manufacturer | |
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High torque output: amplified torque through gear reduction, suitable for steep slopes, mountains and other complex terrain
Modularized design: motor, controller and sensor are highly integrated, and the parts can also be replaced one by one throughout maintenance.
Compatible with a variety of vehicles: can match vehicles with different wheel diameters and tire types.
High stability: The motor is situated in the midst of the vehicle to enhance driving stability, especially suitable for top-speed riding or off-road scenarios.
Wide applicability:It’s suitable for DIY electric scooters, electric bikes, E-Motorcycle Moped, and so on.


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