R9 Ultra 750W Long-Range Fat-Tire Electric Mountain Bike
R9 Ultra model SZYXB-R9Ultra-4 is a fat-tire electric mountain bike for adult commuting and all-terrain riding. It pairs a 750 W rear-hub motor with a 48 V 15 Ah lithium battery, 20 × 4-inch tires, metal frame, seven-speed drivetrain and hydraulic disc brakes. Listed performance includes a maximum speed of 30–50 km/h, a claimed range of up to 140 km per charge and a charging time of more than three hours. Wattage options from 251–350 W through 501–750 W are offered; frame-material, wheel-size and voltage choices are available, with material options including high-carbon steel, aluminium alloy and carbon fibre, wheel sizes of 20, 26 and 29 inches, and voltage choices from 12 V to 60 V.
Product specifications
| Range per Power | 140KM |
|---|---|
| Motor Power | 750 W |
| Voltage | 48 V |
| Motor position | Rear Hub Motor |
| Wheel Size | 20" |
| Tire Width | 20*4" |
| Braking System | Hydraulic Disc Brake |
| Frame Material | Metal |
| Max Speed | 30-50Km/h |
| Gears | 7 speeds |
| Torque | Custom |
| Power Supply | Lithium Battery |
| Charging Time | >3 hours |
| Power Source | Lithium Battery |
| Battery Capacity | 15AH |
| Place of Origin | Guangdong, China |
| Model Number | SZYXB-R9Ultra-4 |
Supplier MOQ: 1 piece
Supplier
Hubei Starland Intelligent Technology Co., Ltd.Group Buy
Current group price: USD 564.40 / piece
0 / 7 pieces
Minimum per buyer: 5 pieces
Next price tier · 7 pieces · USD 530.10
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Deadline · 2026-11-01T06:33:54.627Z