Shopping Cart - $0.00

You have no items in your shopping cart.

Recently added item(s)
Total: $0.00

Fat Tad
Conversion System

  • $1,202.29

    Affirm does a soft check on your credit (which won't affect your credit score).

Product Code: FATTAD-GR20-8-489

Availability: In stock

  • Special Parts for Fat-Tad
  • 26 Mph / 10-44 Mile Range*
  • 48 Volt / 9 - 20Ah Li-ion Battery

Subject to $35 DOT HazMat Shipping fee

Convert your SunSeeker Fat Tad to electric as seen on 

Extras Included:


Extra-long rack struts and rack bracket:

Topeak Bar X-tender computer mount:


Locking parking brake levers:


See details of the kit on video here:




E-BikeKit™ Rear 500w Geared Hub Motor Conversion Kit for Fatbikes
with 48 Volt Li-ion Battery Pack and Charger.

The E-BikeKit 500-1000w geared conversion kit is powered by an internal 5:1 planetary gear hub motor with a clutch. The clutch in the geared motor offers zero drag when pedaling and not engaging battery power. This motor is more efficient, resulting in increased range (especially with "start/stop" riding), has more starting torque, and has greater hill-climbing ability than a direct-drive motor of equal power rating. The motor is also smaller in diameter for increased stealth and 3.4lbs lighter than the 500w direct-drive.

Who's it for? This premium electric bike conversion kit system is for those that want the best of the best in performance, efficiency, weight, stealth, and speed. The top speed is 28MPH! There is a 300lb total load limit so if you plan on more than that, look to a heavy-duty system.

This kit uses a motor designed especially for fatbikes. It provides 170 - 190mm OLD rear spacing (using spacer-washers) and 15mm disc-offset (170mm) - add 10mm disc rotor spacer (not included) and extra-long screws for 15mm disc-offset with 190mm.

Chainline is 64mm. Add our freewheel spacer for a 75mm chainline.



System Specs:
Watts: (Nominal/Peak) 500-1000w (EBK 22Amp Controller)
Top Speed: Approx. 26 MPH @48v in 26" Wheel
Range: 10-44 Miles* (see battery chart)
Charge Time: 3-5hrs (0-100%) (depending on battery choice)
Weight: 21lbs (9.5kgs)
Performance: High
Efficiency: High
Stealth Factor: High


Lithium batteries provide a high level of performance for the duration of each discharge (unlike seal lead-acid where performance is diminished 1:1 as the pack is emptied). Lithium batteries have a much higher power to weight ratio than lead-acid and 5-8 times the number of charge cycles (how many times a rechargeable battery can be charged from 0-100%). The lithium option costs more initially, but over time, the "cost-per-cycle" is about half the cost of lead-acid. Lithium packs also require less care as they can be left partially charged, and do not require immediate charging after each use. All batteries MUST be properly cared for during storage.

Choosing Your Wheel Size: You can find your wheel size written on your tire. Available size options for this conversion kit are 20", and 26". The 20" rim is 54mm wide and the 26" rim is 74mm wide. These rims are suitable for 3" - 4" width tires.

Battery Choice: We offer 3 battery packs for this kit - the 9Ah li-ion blue battery is the lightest and smallest, at just 5.8lbs. The 20Ah li-ion Blue battery is the longest-lasting, with a 20-44 mile range. The 10Ah li-ion aluminum case battery sports a rugged enclosure, carrying handle, and locks in place with a key.

Model Weight Range Mount Style Cost
48v 9Ah 5.8lbs 10-22 Battery bag w/ velcro straps ((included bag and Axiom Journey rear rack) Base Cost
48v 10Ah 9.7lbs 12-26 Rear Rack (included) +$230
48v 20Ah 14lbs 20-44 Battery bag w/ velcro straps (included bag and Axiom Journey rear rack) +$380


Front vs. Rear Wheel: We recommend rears for most conversions. A common misconception is that the front wheel conversions are easier. It is our professional opinion that there are two legitimate reasons to use a front wheel hub motor:

1) You want true two-wheeled drive
2) You have an internal rear hub shifter

If neither applies to your conversion, a rear wheel conversion is likely a better choice.

Learn More: Top 25 FAQ | Front vs Rear Wheel | Compatibility | Pedal Assist Compatibility

Note: Our kits include parts to fit a wide variety of bikes, but do not fit every bike without modification or extra parts. Our representatives are available to help with compatibility questions and make recommendations on additional parts that you may need.

Shipping Note: Li-ion batteries are shipped separately from electric bike kits. Li-ion battery packs are shipped via UPS Hazmat and require a signature for delivery. You may receive your kit, battery, and possibly the battery rack (if applicable), on separate days.

Questions? Call toll-free at 1-866-882-3245 and an experienced professional can assist you. Monday – Friday 9 am-5 pm EST. Outside of business hours get help fast via email.

Brand: Electric Bike Technologies, Inc.
Type: Internally Geared (brushless, disc brake compatible) Fatbike Motor
Power: 500w Nominal / >750w@36v / >1000 @48v
Max Torque: 75N-m @36v / 84N-m @48v
Max RPM: 259 @36v / 320 @48v
Cable: 8" Axle Exit, 3-Phase / 5 Hall Effect
Connector: Round 8-Pin 13/32" (10.4mm)
Weight: 17bs (4.26kg)
Warranty: 1 Year (up to 48v - 300lb max load)

Nominal Voltage: 48v
Nominal Capacity: 9Ah / 10Ah / 20Ah (0.2C)
Battery Energy: 421Wh / 468Wh /  936Wh approx.
Dimensions: See table
Total Weight: 5.8lbs / 9.7lbs / 14lbs
Cell Assembly: 18650-3.6v-13S  4P / 5P / 10P
Life Cycles: 800-1000 Cycles
Max. Continuous Discharge: 20A / 22.5A / 50A 
BMS Protection Current: 30A / 30A / 60A
Discharge Cut-Off Voltage: 39v
Max. Charge Voltage: 54.6v
Inner Resistance: 180mΩ / 180mΩ / 220mΩ 
Charge Time: 4 hours / 3 hours / 5 hours
Operation Temperature Range: Charge: 0°C – 45°C / Discharge: -20°C – 60°C
Storage Temperature: 0°C – 40°C (Extended Storage: 15°C – 25°C;)
Battery Case Material: Blue PVC Heatshrink / Aluminum / Blue PVC Heatshrink
Assembled Pack Certificates: UL; UN38.3; MSDS; RoHS; SGS
Limited Warranty: 1 Year
Manufacturer: Electric Bike Technologies, Inc.

**System includes battery carrying rear rack only when purchased with a 48v 10Ah aluminum case battery. Otherwise includes a battery bag.

UN 38.3 Certified e-bike battery
Assembled Pack Certificates: UL; UN38.3; MSDS; RoHS; SGS

Every E-BikeKit conversion kit comes with all of the parts you'll need for your conversion.

1 x USA Hand-Built Wheel w/ Disc-Brake Compatible Hub Motor
1 x 36/48V Compatible 22Amp 12FET Controller
1 x Programmable LCD Dashboard
1 x PAS 12-Magnet Split Disc
1 x PAS Sensor Left Side Mount (right side mount by request)
1 x Thumb Throttle
2 x Left & Right E-Brake Levers w/ Parking Lock
1 x Motor Cable
1 x Accessory Cable
1 x Battery Wire Harness (kits w/o batteries only)
1 x Freewheel (rears only)
1 x Battery
1 x Battery Charger
1 x Owner's Manual w/ Installation Guide
**Zip Ties, C-Washers & Torque Arms in Every Kit!

Extras for Fat-Tad Kit:
1 x Pedal-Assist Extension Cable
1 x Fat-Tad Rack-to-Frame Bracket & Hardware
1 x Extra-Long Rack Struts
1 x Axiom Journey Rear Rack (for 9 and 20Ah batteries) or 2-Tier Rear Rack for 10Ah Batteries
1 x Topeak BarXtender



Customer Reviews

Based on 8 reviews Write a review
Financing Options NOW Available!