QS Motor QS273 40H (20×4")
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Genuine QS Motor QS273 40H direct-drive hub motor, pre-laced into a 20×4" fat rim. 273mm rotor, 40mm magnet stack, 16 pole pairs, 48–96V (72V design), ~250 N·m, ~18.2 kg, IP54. 150mm dropout, double-axle, spoke-laced, dual hall sensors. The largest spoke-laced QS hub motor — moped/light-motorcycle territory. Sold pre-laced by NBPower among other sellers.
In brief: 4000W direct drive rear hub motor. 20x4" wheel. Fits 150.0mm dropout. 48–96V rated. Disc brake compatible. From $606 across 4 sellers.
Specs verified Sep 12, 2026
Where to Find
Prices tracked across 5 sellersAliExpress
$605.84 $565.84 + $180.66 shipping
AliExpress - NBEBIKES Store
$659.60 + $173.91 shipping
eBay
$899.00 + $50.00 shipping
eBay - NBPOWER EBIKES
$899.00 + $50.00 shipping
AliExpress - NBEBIKES Store
Check seller for priceAliExpress - ND Ebike Factory Store
Check seller for priceAliExpress - ND Ebike Factory Store
Check seller for price* Shipping estimates are for the contiguous US and may vary by location.
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Price History
Current best price $659.60. Over the past 90 days: low $659.60, high $659.60, average $659.60 — about average.
- AliExpress - NBEBIKES Store
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Specifications
Performance
- Drive Type
- Direct Drive
- Wattage
- 4000W
- Peak Wattage
- 8000W
- Rated Voltage
- 48–96V
- Pole Pairs
- 16
- Max Torque
- 250.00Nm
- Max Speed
- 120km/h
Fitment
- Position
- Rear
- Dropout Width
- 150mm
Wheel
- Pre-laced
- Yes
- Wheel Size
- 20" x 4" (Fat)
- Disc Brake
- Yes
- Rim Brake
- No
- Spoke Holes
- 36
Physical
- Weight
- 18.2 kg
Ports & Connectors
| Pin | Wire color | Function |
|---|---|---|
| 1 | Yellow | Phase A |
| 2 | Green | Phase B |
| 3 | Blue | Phase C |
| Pin | Wire color | Function |
|---|---|---|
| 1 | Red | 5V Power |
| 2 | White | Motor Temp |
| 3 | Black | Ground |
| 4 | Yellow | Hall A |
| 5 | Green | Hall B |
| 6 | Blue | Hall C |
