Fat Tire Electric Bike Kit 36V/48V 500W - Snow & Sand E-Bike Hub Motor Kit (20", 24", 26" × 4.0")
Conquer snow, sand, mud, and steep mountain trails with the 36V / 48V 500W Fat Tire Electric Bike Conversion Kit. Engineered specifically for 4.0'' wide fat tire bikes, this high-performance conversion kit features a high-torque brushless geared hub motor pre-laced into an ultra-wide 8cm double-wall aluminum alloy rim with 12G heavy-duty spokes. Designed with dropout options for 135mm Front Forks, 170mm Rear Dropouts, and 190mm Rear Dropouts in 20'', 24'', and 26'' wheel sizes, it delivers up to 66 N·m of climbing torque and speeds up to 35 km/h (22 mph).
Whether you ride a 20-inch folding fat bike, a 24-inch mid-size cruiser, or a 26-inch snow bike, this kit fits standard 4.0-inch outer fat tires. Choose between standard threaded freewheels or modern splined cassette freehubs to seamlessly match your bicycle's existing gearing and derailleur configuration.
| Specification | Technical Details |
|---|---|
| Motor Type | Brushless Geared Hub Motor (High-Torque Planetary Internal Drive) |
| Voltage / Power | 36V 500W or 48V 500W |
| Rated Speed | 32–35 km/h (approx. 20–22 mph) |
| Rated RPM & Torque | 289–346 RPM | 59–66 N·m Peak Torque |
| Fork / Dropout Spacing | Front Wheel: 135–142 mm | Rear Wheel: 170 mm or 190 mm |
| Rim Dimensions | 80 mm (8 cm) Wide Double-Wall Rim, 36 Holes, 12G Spokes |
| Tire Compatibility | Designed for 20×4.0'', 24×4.0'', or 26×4.0'' Fat Tires |
| Brake Compatibility | Standard 6-Bolt Disc Brake Mount (44mm BCD) |
| Climbing Ability | Up to 35° Incline Grade |
Note: Battery is not included. Pair with a 36V or 48V e-bike lithium battery rated for 20A–30A continuous discharge current.
Measure the inside distance between your fork dropouts (front) or rear frame dropouts. Standard fat bike front forks measure 135mm across. Rear fat bike frames typically measure either 170mm (common on earlier or compact fat bikes) or 190mm (common on modern 4.0''–4.8'' wide tire bikes). Ensure you select the matching rear width (170mm or 190mm) before purchasing.
Yes. The 80mm (8cm) wide double-wall rim is custom-engineered to seat 20×4.0, 24×4.0, and 26×4.0 inch fat bike tires securely, providing the wide profile required for low-pressure snow and beach riding.
For 36V kits, use a 36V lithium-ion battery. For 48V kits, use a 48V lithium-ion battery. Because fat tires create higher rolling resistance in snow and sand, a battery capacity of 13Ah to 20Ah is recommended to achieve an estimated 35–70 km (22–45 miles) of ride range.
Yes, fat bike frames utilize disc brakes. The hub motor features standard 6-bolt disc brake mounting holes with 44mm spacing, allowing you to transfer your existing 160mm, 180mm, or 203mm rotor directly onto the motor.
Yes, all conversion kits ordered through E Smart Way include responsive customer support, manufacturer warranty coverage, and free storewide shipping.
