Electric Bike Conversion Kit – 750W Rear Wheel Fatbike (Battery Included)

• Purpose-built rear-wheel electric conversion kit for fatbikes
• 750W nominal system with strong torque and peak power at 48V
• Pedal-assist (PAS) and throttle control
• Complete system with 48V lithium battery included
• Designed for 170–190mm rear dropout spacing

A high-performance electric bike conversion system engineered specifically for fatbikes, delivering strong torque, efficient power delivery, and reliable performance on snow, sand, gravel, and mixed terrain.

Rear Fatbike Electric Bike Conversion System

The E-BikeKit™ Rear Fatbike Conversion System is designed for riders who want a powerful, torque-rich electric fatbike without the excess weight and drag of a direct-drive motor.

This system is built around a 750W nominal electric drive system operating at 48 volts with a high-output controller, delivering responsive low-speed torque and efficient power delivery across varied terrain.

Compared to direct-drive motors, this fatbike-specific geared system is lighter, more responsive, and better suited to mixed terrain riding, making it ideal for riders who want performance without sacrificing handling.

Who is this kit for? Riders who want a powerful electric fatbike for snow, sand, gravel, and off-road use. Recommended for total system loads up to 300 lbs.

• Rear dropout spacing: 170mm standard (disc brake)
• Optional spacing: 190mm for non-disc setups
• Disc offset: 15mm at 170mm spacing
• 190mm disc setups: require a 10mm rotor spacer and longer rotor bolts (not included)
• Chainline: 64mm standard

Rear wheels are built and spaced based on your selected configuration. Because fatbike frames vary, minor fitment adjustments may be required.

• System type: Rear-wheel electric bike conversion kit for fatbikes
• Nominal power: 750W
• System voltage: 48V
• Peak power capability: Higher short-duration output for acceleration and hills
• Estimated range: 10–25 miles (terrain, assist level, and conditions dependent)
• Maximum torque: 84 Nm @ 48V
• Motor weight: ~17 lbs (7.7 kg)
• Total load limit: 300 lbs

This conversion system includes a 48V 15Ah lithium-ion battery and charger.

The battery includes its own mounting rail designed to attach using two standard water-bottle bosses. No additional battery mounting hardware is included or assumed.

The battery may be mounted anywhere a secure two-bolt pattern can be installed, including the downtube, a custom mounting plate, or inside a battery bag mounted to a rear rack.

• USA hand-built rear fatbike motor wheel (configured to your spacing)
• 48V-compatible 22A / 12-FET controller
• Programmable LCD dashboard
• PAS split disc and left-side PAS sensor
• Thumb or split-twist throttle
• Left & right e-brake levers
• Main motor cable
• 3-to-1 accessory cable
• Battery wire harness
• 48V 15Ah lithium-ion battery and charger
• Zip ties, C-washers, and torque arms

Learn more: Top 25 Frequently Asked Questions

Questions? Call us toll-free at 1-866-882-3245, Monday–Friday, 9am–5pm EST, or email support@ebikekit.com.

Battery shipping: Lithium-ion batteries ship separately via FedEx/UPS Hazmat and may require a delivery signature. It is normal for components to arrive in multiple shipments.