Kit - Fat-Tad

This Fat-Tad–specific E-BikeKit system converts the Sun Fat-Tad CXS into a fat-tire electric tadpole trike using a rear 750W geared hub motor and a 48V 15Ah downtube lithium-ion battery pack.

• Special parts tailored for the Sun Fat-Tad CXS
• 20" fat rear wheel with 8-speed freewheel
• Approximate top speed of 24 mph
• Estimated 15–45 mile range depending on rider, terrain, and input
• 48V 15Ah downtube Li-ion battery with charger

The 750–1000W geared hub motor uses an internal 5:1 planetary reduction and a clutch. The clutch provides zero drag when pedaling without motor power, while the geared design delivers stronger hill-climbing ability, high efficiency, and excellent low-speed control. The motor is smaller and lighter than a direct-drive equivalent, improving handling and stealth.

Who’s it for? Riders who want a powerful, torque-rich, fat-tire tadpole build with off-road flexibility and responsive performance. Total recommended system load: 300 lb.

Walk-Around Video:

Fat-Tad–Specific Extras:

• Locking parking brake levers
• Short (12") motor cable for compact tadpole routing

Core Conversion Kit Components:

• USA hand-built 20" fat wheel with disc-brake compatible 750W geared rear hub motor
• 48V compatible 22A 12FET controller
• Programmable LCD dashboard
• Mini III PAS left-side sensor
• Thumb throttle
• Left & right e-brake levers with parking lock
• Main motor cable
• 4-to-1 accessory cable
• Battery wire harness (included only when battery is not ordered)
• Battery & charger (when ordered)
• Zip ties, C-washers, and torque arms

Motor Specifications

• Brand: EBikeKit LLC
• Type: Internally geared fat-bike motor (brushless, disc-brake compatible)
• Power: 750W nominal / 1000W peak @ 48V
• Max Torque: 84Nm @ 48V
• Max RPM: ~320 @ 48V
• Cable: 8" axle exit, 3-phase / 5 Hall sensors
• Connector: Round 8-pin (10.4 mm)
• Weight: ~17 lb (7.7 kg)
• Rear Dropout Spacing: 170–190 mm (fat-bike)
• Total Load Limit: 300 lb (trike + rider + cargo)

This system includes a 48V 15Ah downtube-style lithium-ion battery pack and charger.

• Nominal Voltage: 48V
• Nominal Capacity: 15Ah
• Energy: ~720Wh
• Estimated Range: 15–45 miles
• Total Weight: 10.1 lb (4.6 kg)
• Cell Type: 18650, 13S4P
• Life Cycle: 500–800 cycles
• Max Continuous Discharge: 16A
• BMS Protection: 20A
• Discharge Cut-Off: 37.5–42V
• Max Charge Voltage: 54.6V
• Internal Resistance: ≤230mΩ
• Charge Time: ~5 hours
• Operating Temp (Charge): 0°C–45°C
• Operating Temp (Discharge): −20°C–60°C
• Storage: 0°C–40°C (15°C–25°C ideal)
• Certifications: UN38.3; MSDS; UL1642/2580-listed cells

This section gives dealers reference points, pricing perspective, and support information to help position and sell this system confidently.

Comparable Complete Trike:

• View the full Fat Tad CXS electric trike (with this same system installed):
  Fat Tad CXS Tadpole Electric Trike – ElectricTrike.com
• Use the complete-trike listing to compare presentation, finished build quality, and consumer-facing pricing.
• When quoting, remember that fully built trikes shipped direct typically incur a flat-rate freight cost of ~$300.

Dealer Support Commitment:

• Need help? We provide hands-on installation support for all dealers.
• Text, email, and phone support available for real-time troubleshooting.
• Direct access to experienced system builders and wheel technicians.
• Custom wheel builds and spacing assistance available when required.
• Guidance for tricky routing, torque-arm placement, battery mounting, and fat-tire alignment.
• Fast turnaround on technical questions to support your shop floor.

Our goal is simple: Make every dealer look like the expert with every customer, every time.

This system is designed specifically for the Sun Fat-Tad CXS tadpole recumbent fat trike.

• Engineered for 20" fat rear wheel and 8-speed freewheel
• Requires 170–190 mm fat-bike style dropout spacing
• Optimized for torque-rich, off-road and mixed-terrain performance

Fitment may require dropout spacing adjustments or minor hardware modifications depending on frame variations.

The Fat-Tad system installs using standard bike tools and is designed for compatibility with Sun Fat-Tad rear dropout spacing.

• 20" fat motor wheel installs into rear dropouts (170–190 mm with spacers)
• Controller, LCD, and wiring use matched connectors
• PAS sensor mounts at the crank
• Parking-lock brake levers replace stock brake levers
• Torque arms must be installed and axle nuts torqued correctly
• Battery must be mounted securely to the frame
• Optional Topeak bar extender (not included) can improve LCD placement

Proper cable routing, torque-arm installation, and secure component mounting are essential to safe operation.