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Electric EZ-3 USX HD

  • $ 2,682.00

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  • Heavy-Duty Electric Delta Recumbent
  • 20 mph Top Speed / 10-44 Mile Range*
  • 400 lb Capacity w/ Low Center of Gravity
$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 EZ-3 USX HD provides all the stability and control available in recumbent trike technology while offering a little more thrill. The HD stands for heavy duty, with 110 psi tires, 48 spoke wheels with double-wall rims. The direct-drive motor is also HD and designed for heavier loads with 1000 watts of peak power.

Setting this trike apart from others is its low center of gravity attained by three 20-inch wheels that are cambered in the rear to increase cornering stability. The EZ-3 USX HD offers powerful brakes on all three wheels, mid-frame suspension and under-the-seat steering. The EZ-3 USX features Direct Steering, the new Slotted Seat adjustment system, and rattle-free and infinite-adjust seat struts.

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


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:



    • Low center of gravity
    • Stable cambered rear wheels
    • HD 48-spoke rear wheels
    • Double-wall rims
    • High-pressure tires
    • Rated for riders up to 400lbs
    • Extra padded mesh seat
    • Mid-frame suspension
    • 20” x 1.9” tires
    • Quick release adjustable seat
    • Quick release backrest
    • Dual rear disc & front v-brake

      Tricycle Specifications:

      • 20" x 1.9" tires
      • Wheel Base: 59.5" (151cm)
      • Overall Length: 78" (198cm)
      • Width: 32" (81cm)
      • Seat Height: 18" (45cm)
      • Weight: 65lbs
      • Weight Limit: 400lbs
      • X-Seam: 36-47"


      • 80" x 40" x 44" x 190lbs


      • 1000w peak power
      • HD Direct-Drive Motor
      • 10-20 mile range
      • 48v10ah Li-ion Battery
      • USA hand-built wheel
      • 5-level top speed control


        Watts (Nominal/Peak): 500-1000w
        Top Speed: Approx. 20mph
        Range: 10-20 Miles
        Charge Time: 2.5hrs (0-100%)
        Weight: 24lbs (11kgs)


        Brand: Electric Bike Technologies
        Type: Direct-Drive (gearless)
        Power: 500w nominal / >1000 @48v
        Max Torque: 46N-m @48v
        Max RPM: 259 @48v
        Cable: 8" axle exit, 3-phase / 5 hall effect
        Connector: Round 8-pin 13/32" (10.4mm)
        Weight: 12.8lbs (5.8kg)


        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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