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Electric Fat-Tad

  • $ 2,962.00

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  • FAT Tire Suspension Tadpole Trike
  • 23 mph Top Speed / 10-44 Mile Range*
  • 4.0" Fat Tires for All Trail Conditions
$250 flat-rate to Contiguous USA Only
What is this?

How to Measure Your X-Seam

At we like to use the X-Seam Measurement to fit riders on recumbent trikes, and inseam to fit riders on upright trikes (like the sun traditional).

We use this measurement to adjust your trike to fit you out-of-the-box, but it's simple to adjust your trike later to suit your preferences. This is just a rough measurement to make things easier for you.

You can see how to take the measurement in our video here.


Or you can read about how to measure it in-depth here:

To measure your X-seam, you'll need a tape measure, a sturdy board (like a piece of plywood or an ironing board), and an assistant to help you. If you currently ride a recumbent bike, you can use that to take the measurement instead of the board.


Start by placing the board against a wall at 60*. You can use a protractor (or print this one out) to measure the angle, or just measure the length of your board, divide that length by 2 and place the end of the board that distance from the wall. Example: a 36" long board will be placed 18" away from the wall to get a 60* angle.


Now, measure the length from the end of the board to the end of your feet. This is your X-Seam.


If you're having trouble with the measurement or want to size your bike a different way, feel free to choose "I'm not sure" from the drop-down menu and we can discuss your needs after you place your order.




The Fat-Tad SUN tadpole trike is a beast on trails and can conquer almost any terrain. With fat 4" wide tires, rear coil-over suspension and integrated front suspension the Fat-Tad climbs over obstacles with ease and keeps you stable.

Setting this electric trike apart from others is its pure beastly awesomeness. If you want loads of power and fun on the trails this is the ultimate electric recumbent. This e-trike utilizes the compact yet powerful 1000w performance electric drive system paired with a 48 volt Li-ion battery pack for 23 mph top speeds and plenty of torque.

Model Weight Range Mount Style Cost
48v 9ah 5.8lbs 10-22 Battery bag with velcro straps Base Cost
48v 10ah 9.7lbs 12-26 Sliding plate with lock +$286
48v 20ah 14lbs  20-44 Battery bag with velcro straps +$366


Battery Option Overview:

Slick Vs. Knobby Tires:

Videos, written instructions and links related to the electrical system and the conversion process that was performed on this tricycle. Specific tasks and additional parts needed to convert this trike in the best possible way.

Conversion Points:




  • Rear coil-over suspension and integrated front suspension
  • Alloy rims, 55mm wide, 190mm rear hub
  • Promax mechanical disc brake system for front wheels
  • 20 x 4.0" tires tuned for all trail conditions
  • Full-range SRAM shifting with 3x8 gearing
  • Ergonomic chromoly handlebars
  • Air-mesh seat with alloy seat frame
  • 10" of trail-ready ground clearance

    Tricycle Specifications:

    • 20" x 4" tires
    • Wheel Base: 59" (150cm)
    • Overall Length: 78" - 83.5" (198 - 212cm)
    • Width: 33.25" (92cm)
    • Seat Height: 16.5"- 17.75" (42-45cm)
    • Bottom Bracket Height: 20" - 21.5" (51-55cm)
    • Weight: 57 lbs
    • Weight Limit: 250 lbs
    • X-Seam: 37" - 50.5" (94-128cm)
    • (Boom modification may be required from 37" - 40")


        • 80" x 40" x 44" x 190lbs


    • 1000w peak power
    • 23 mph top speed
    • 12-26 mile range
    • 48v10ah Li-ion Battery
    • USA hand-built wheel
    • 5-level top speed control


      Watts (Nominal/Peak): 500-1000w
      Top Speed: Approx. 26mph
      Range: 10-26 Miles
      Charge Time: 3hrs (0-100%)
      Weight: 21lbs (9.5kgs)


      Brand: Electric Bike Technologies
      Type: Internally Geared (brushless)
      Power: 500w nominal / >1000 @48v
      Max Torque: 84N-m @48v
      Max RPM: 320 @48v
      Cable: 8" axle exit, 3-phase / 5 hall effect
      Connector: Round 8-pin 13/32" (10.4mm)
      Weight: 9.4lbs (4.26kg)


      Nominal Voltage: 48v
      Nominal Capacity: (depends on choice - 9 - 20ah)
      Battery Energy: (depends on choice - 490 - 1092wh)
      Dimensions: (depends on choice)
      Total Weight: <= (depends on choice)
      Cell Assembly: 18650-3.6v-13S
      Life Cycles: >=80% Dod = 500 cycles
      Max. Continuous Discharge: 22.5A
      BMS Protection Current: 30A
      Discharge Cut-Off Voltage: 37.5v
      Max. Charge Voltage: 54.6v
      Inner Resistance: < 50mΩ
      Charge Time: <= 3.3 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 Box Material: (depends on choice - aluminum or vinyl w/ canvas bag)
      Assembled Pack Certificates: UL; UN38.3; MSDS; RoHS; SGS
      Manufacturer: Electric Bike Technologies

      UN 38.3 Certified E-Bike Battery



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