Fat Tire Electric Bike Kit 36V/48V 500W-750W - Snow & Sand Hub Motor Kit (20", 24", 26" × 4.0")
Tackle deep snow, soft beach sand, mud, and steep rugged trails with the heavy-duty 36V / 48V 500W & 750W Fat Tire Electric Bike Conversion Kit. Engineered specifically for 4.0-inch wide fat bike tires, this high-performance system features a high-torque brushless hub motor pre-built into a reinforced double-wall aluminum alloy rim with 12G heavy-duty spokes. Offering both 500W (up to 66 N·m torque) and ultra-powerful 750W (up to 85 N·m torque) options across 135mm Front, 170mm Rear, 170mm Cassette, and 190mm Rear dropouts, it transforms standard fat bikes into all-season, all-terrain electric powerhouses.
The 80mm wide rim profile is engineered to give 4.0-inch tires their optimal contact patch for maximum flotation over soft terrain. The rim includes precision cutouts to reduce rotational weight without sacrificing structural rigidity.
| Specification | 36V / 48V 500W Motor | 48V 750W Motor |
|---|---|---|
| Motor Design | Brushless Geared Hub Motor (High-Torque Planetary Drive) | |
| Rated Speed | 32–35 km/h (20–22 mph) | 35–40 km/h (22–25 mph) |
| Rated RPM | 289–346 RPM | 430 RPM |
| Maximum Torque | 59–66 N·m | 85 N·m |
| Fork / Dropout Size | Front: 135–142mm | Rear: 170mm or 190mm | Rear: 170mm (Freewheel or Cassette) |
| Available Wheel Sizes | 20'', 24'', 26'' (Double-Wall 80mm Wide Rim) | |
| Tire Size Fitment | 20×4.0'', 24×4.0'', 26×4.0'' Fat Tires | |
| Brake Standard | Standard 6-Bolt Disc Brake Mount | |
| Climbing Angle | Up to 35° | |
Note: Battery is not included. A 36V or 48V lithium-ion e-bike battery rated for 25A–35A continuous discharge current is recommended.
The 500W motor is ideal for moderate trails, beach riding, and daily commuting, offering speeds up to 35 km/h with 59–66 N·m of torque and lower battery consumption. The 750W version delivers a massive 85 N·m of torque and speeds up to 40 km/h, making it the top choice for heavy riders, steep hills, and deep snow or mud where maximum crawling power is essential.
Measure the inner distance between the axle slots. Fat bike front forks measure 135mm across. Rear dropouts on fat bikes are either 170mm or 190mm wide. If your rear frame measures 170mm, you can also select the 170mm Rear Cassette option if your bike uses a modern slide-on gear cassette.
For the 48V 750W kit, select a 48V lithium battery with at least 30A continuous discharge current (BMS rated at 30A or higher). Capacities between 14Ah and 20Ah provide approximately 40–80 km (25–50 miles) of riding range depending on terrain and assist level.
Yes. The hub motor features standard international 6-bolt disc brake mounting patterns (44mm bolt circle diameter), allowing you to mount your existing 160mm, 180mm, or 203mm rotor directly.
Yes, all conversion kits ordered through E Smart Way include responsive customer support, manufacturer warranty coverage, and free storewide shipping.
It arrived ahead of schedule, by as much as half a month via SDEK. Thank you so much. The product is intact, and the quality is evident. The plug is exactly what I needed.
I haven't tested it yet, but the delivery schedule is accurate.
Everything comes very well packaged, the shipping was a bit slow but I already have it here. Thank you very much.
