Fat-Tire Spoke Hub Motor

Qianjiang is a professional motor manufacturer. Our Fat-Tire Spoke Hub Motor is specifically designed for wide-tire electric vehicles, snow bikes, beach buggies, and fat-tire mountain bikes. Featuring a spoked-wheel structure, it accommodates extra-wide tires (4.0–5.0 inches), providing a large contact patch and superior traction on snow, sand, and muddy terrain.

Utilizing an outer-rotor brushless direct-drive design, the motor delivers high starting torque and operates without gear noise. It is suitable for both OEM integration and aftermarket retrofitting, supports disc brakes, and is compatible with various rim specifications and rear fork dropout widths. ODM customization is available for power, voltage, and dropout dimensions.

Key Advantages

1. Compatible with Wide Fat Tires

This fat-tire spoked hub motor supports 4.0–5.0 inch wide tires. The large contact patch prevents slipping on snow, sand, mud, and gravel, making it ideal for off-road use, snow riding, and outdoor utility vehicles.

2. Easy Maintenance and Repair

The motor features a traditional spoked hub design; the rim and spokes can be replaced individually. Compared to integrated (cast) wheels, repair costs are lower in the event of impact-induced deformation.

It supports various rim sizes, offering flexible configuration options.

3. Low Noise and Long Lifespan

The gearless design ensures quiet operation and eliminates potential failure points associated with gear wear. With bearings as the only major wear parts, long-term maintenance requirements are minimized.

4. High Torque Output

Utilizing rare-earth NdFeB (neodymium) magnets, the motor delivers ample low-speed torque. It provides powerful starting capabilities for heavy loads and steep inclines, making it suitable for cargo/passenger transport and off-road hill climbing.

5. Safe and Stable Braking

Equipped with a standard disc brake mounting flange for direct disc installation. The combination of wide tires and disc brakes ensures reliable braking in heavy-load, off-road scenarios.

6. High-Protection Sealing

The motor housing is sealed to meet IP54–IP65 protection standards, effectively resisting rain and mud splashes.

A dual-Hall sensor design, including a backup set, enhances system reliability.

7. Customizable Specifications

Qianjiang Motor offers customization for voltages (48V/60V/72V) and power ratings (500W–3000W).

Options include adjustable dropout widths, wheel diameters, and cable exit configurations; supply options range from standalone motors to complete wheelset kits.

Application Scenarios

✔ Fat-tire e-bikes and snow e-bikes

✔ Beach off-road vehicles and customized outdoor off-road vehicles

✔ Wide-tire cargo e-bikes and sightseeing/mobility vehicles

✔ Export-oriented modification kits and OEM components for new vehicle models

Technical Specifications

Kit Contents

The wheel kit includes:

Spoked hub motor unit (for wide tires), double-wall aluminum alloy wide rim, stainless steel spokes, disc brake flange, waterproof aviation connector, mounting spacers, and an instruction manual.

Qianjiang can match the appropriate model based on specifications such as wheel diameter, mounting dimensions, battery voltage, power output, speed, torque, and vehicle load.

For non-standard wheel configurations, we offer custom development, taking into account factors like motor structure, heat dissipation, and controller compatibility, and support everything from prototypes and small-batch runs to mass production. Please contact us to discuss your specific requirements.

FAQ

Q: What is the difference between the Fat Tire Spoke Hub Motor and the integrated wide-tire motor?

A: The Fat-Tire Spoke Hub Motor uses spokes to connect the motor hub to the rim; the rim or spokes can be replaced individually, resulting in lower maintenance costs.

The integrated wheel is a single cast unit; while it looks attractive, any deformation from impact requires replacing the entire wheel, leading to higher maintenance costs.

The spoked version is recommended for off-road use.

Q: What tire width is supported?

A: The compatible rim supports 4.0–5.0 inch fat tires; exceeding the rim's maximum tire width rating is not recommended.

Tires that are too wide may cause issues such as the tire coming off the rim or rubbing against the frame. Please verify rim specifications before ordering; feel free to contact us with any questions or for technical support.

Q: What if the swingarm dropout width doesn't fit?

A: Common standard dropout widths are 175mm and 190mm. If the frame dropout width doesn't match, minor adjustments can sometimes be made using thicker spacers; however, significant discrepancies require frame modification or a custom motor axle length. Please be sure to confirm your frame's swingarm dropout width before ordering.

Q: What are the benefits of a dual Hall sensor setup?

A: It features two sets of Hall sensors: one active and one backup. If one set fails, the controller can switch to the backup channel, preventing a total loss of rideability and enhancing reliability for off-road and outdoor use.

Q: Can this motor be used in snowy or coastal (saltwater) environments?

A: Yes, it can handle standard rain and snow conditions.

In coastal environments with high salt spray, regular maintenance of spokes and bearings is recommended, along with ensuring waterproof connections. For long-term coastal use, a custom anti-rust treatment is advised.

Q: Is motor heating normal?

A: It is normal for the motor casing to feel warm during continuous operation under heavy loads or when climbing hills.

If the motor becomes hot enough to burn to the touch or emits a burnt odor, you should reduce the load and check if the controller's current limit settings are appropriate.