Kit - Fat Bikes Rear Wheel

• Proven, reliable modular system design
• Hand-built wheel with 12-gauge stainless spokes & double-walled rim
• Full-color LCD with customizable speed limits & system settings

E-BikeKit Rear 750W Geared Hub Motor Conversion Kit for Fat Bikes with 48V 15Ah Lithium-Ion Battery Pack and 3A Charger.

The E-BikeKit 750–1000W geared system uses a 5:1 internal planetary reduction and an integrated clutch, allowing zero-drag pedaling when the motor is not engaged. Compared to direct-drive motors, the geared design offers better efficiency, higher starting torque, stronger hill-climbing ability, greater range in stop-and-go riding, and a more compact motor profile.

Fat-Bike Rear Dropout Spacing: This motor is assembled for 170 mm OLD with a 15 mm disc offset. It can also be spaced for 190 mm non-disc setups using supplied spacer washers. For 190mm fat bikes with disc brakes, rotor shims and longer rotor bolts may be used to achieve proper alignment. Default chainline is 64 mm. Add a freewheel spacer to increase chainline to 75 mm when needed.

Who’s it for? Riders seeking maximum torque, efficiency, stealth, and overall performance on fat-bike platforms requiring 170–190 mm spacing. Top speed is approximately 28 mph. System load limit is 300 lb (bike + rider + cargo). For higher total loads, consider a heavy-duty system.

Note: This system fits a wide range of fat-bike frames, but some installations may require additional spacing, hardware, or minor adjustments. Contact us if you need compatibility support.

Every E-BikeKit fat-bike conversion kit includes:

• USA hand-built wheel with 750W geared fat-bike hub motor (disc-brake compatible)
• 48V compatible 22A 12FET controller
• Programmable LCD dashboard
• PAS 12-magnet split disc
• PAS sensor — left-side mount (right-side available upon request)
• Thumb and split-twist throttle options
• Left & right locking e-brake levers
• Main motor cable
• 3-to-1 accessory cable
• Battery wire harness (only included when a battery is not ordered)
• Freewheel (fat rear kits only)
• Battery & charger (when ordered)
• Zip ties, C-washers, Allen keys & torque arms

Battery mounting hardware is not included — mounting solutions vary by fat-bike frame.

• Brand: EBikeKit LLC
• Type: Internally geared (brushless, fat-bike specific, disc-brake compatible)
• Power: 750W nominal / ~1000W peak @ 48V
• Max Torque: 84Nm @ 48V
• Max RPM: ~320
• Cable Exit: 8″ axle exit — 3-phase / 5 Hall sensors
• Connector: Round 8-pin (10.4 mm)
• Motor Weight: ~17 lb (7.7 kg)
• Rear Dropout (OLD): 170 mm standard / configurable to 190 mm
• Chainline: 64 mm (75 mm with additional spacer)
• Load Limit: ~300 lb system total

This system may be ordered with or without a 48V 15Ah lithium-ion battery pack.

• Range: 15–45 miles depending on terrain, rider weight, and assist level
• Charge Time: ~5 hours with 3A charger
• Nominal Voltage: 48V
• Nominal Capacity: 15Ah
• Energy: ~720Wh
• Total Weight: ~10.1 lb (4.6 kg)
• Cell Configuration: 18650 lithium cells, 13S4P
• Life Cycles: ~500–800
• Max Continuous Discharge: 16A
• BMS Protection: 20A
• Discharge Cut-Off Voltage: ~37.5V
• Max Charge Voltage: 54.6V
• Internal Resistance: ≤230 mΩ
• Operating Temp (Charge): 0°C–113°F
• Operating Temp (Discharge): −68°F–140°F
• Storage Temp: 0°C–104°F (59–77°F preferred)
• Certifications: UN38.3, MSDS, UL-listed cells

This 750W fat-bike system has been installed successfully by many dealers and is a proven, reliable option for wide-frame fat bikes requiring 170–190 mm spacing.

Dealer Support Commitment:

• Real-time installation support via text, phone, and email
• Direct access to system builders and wheel technicians
• Guidance for spacing motors to 170 mm or 190 mm
• Support with disc rotor shimming and chainline adjustments
• Help verifying frame clearance on unique fat-bike builds
• Fast responses to shop-floor questions and compatibility checks

If you need help with a specific fat-bike model:
Send photos of the rear dropouts, derailleur side, and chainstay spacing — we’ll confirm compatibility and recommend the correct setup.

Our mission: Support every dealer in delivering clean, professional installs on all fat-bike platforms.

This system is designed specifically for fat bikes using wide-frame rear spacing.

Compatible With:

• 170 mm rear dropout spacing (standard configuration)
• 190 mm frames (with additional spacing/shims)
• Fat-bike frames using threaded freewheels
• Frames with disc or non-disc configurations

Not Compatible With:

• Rear thru-axle fat-bike frames
• Frames designed exclusively for cassettes (not compatible with freewheels)
• IGH (internal geared hub) frames where the hub cannot be replaced

If unsure, send us rear dropout photos — we’ll confirm compatibility quickly.

This fat-bike kit installs using common bike tools and includes specialized spacing hardware.

• Install the rear motor wheel into 170 mm or 190 mm dropouts (using supplied spacers as needed)
• Controller, LCD, and harness connect using matched plugs
• Mount the PAS disc and sensor (left side standard; right side available)
• Throttle and e-brake levers replace existing controls
• Install torque arms and tighten axle nuts to spec
• Battery must be mounted securely using an appropriate frame mount
• Rotor shimming may be required for 190 mm disc applications

Correct spacing, torque-arm installation, and clean cable routing are essential for safe, long-term performance.