Geared hub motors with the wide axle spacing fat-tire frames demand: 135mm front through
170-190mm rear dropouts clear 4”-5” tires on snow, beach and all-terrain builds. Gear
reduction keeps torque high for soft-surface riding where direct-drive hubs bog down.
These are wholesale, quote-only motors. Tell us your frame’s dropout spacing, tire width,
target power and voltage and we’ll confirm the matching model and pricing.
Models & specifications
| Model | Position | Voltage | Rated power | Reduction | Dropout | Wheel sizes | Weight | Top speed |
|---|
| GDF-15FAT | Front | 36V/48V | 250-500W | 1:5 | 135mm | 16”-28” | 4.15 kg | 25-40 km/h |
| GDR-15FAT-1 | Rear | 36V/48V | 250-500W | 1:5 | 170/190mm | 16”-28” | 4.15 kg | 25-40 km/h |
| GDR-15FAT-2 | Rear | 36V/48V | 250-750W | 1:5 | 175/190mm | 16”-28” | 4.2 kg | 25-42 km/h |
| GDR-19FAT | Rear | 48V/60V | 750-1200W | 1:5 | 175/190mm | 16”-28” | 5.5 kg | 25-45 km/h |
All models: IP54 waterproof rating, ≥78% efficiency, -20 °C to 45 °C operating range,
24/96h salt-spray tested, V-brake and disc-brake compatible.
Highlights
- True fat-bike spacing: 170-190mm rear dropouts — not adapted standard hubs — so wide rims and tires fit without spacers.
- Soft-terrain torque: 1:5 gear reduction keeps the wheel turning through sand and snow.
- Up to 1200W: the GDR-19FAT covers 48V-60V high-power builds for demanding terrain.
