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Electric Eco-Delta SX

  • $ 1,898.00

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  • Economical Delta Recumbent
  • 20 mph Top Speed / 10-44 Mile Range*
  • Comfort High Seat for Easy Mounting
$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 Eco Delta SX is the most affordable SUN delta trike and it's full of features. It has a fully adjustable mesh-back saddle with a padded bottom that keeps you cool and comfortable. There are spare bottle mounts on the handlebar and seat frame.

Setting this electric trike apart from others is its traditional handlebars, higher seating position and lower cranks better suited for casual riding. This e-trike utilizes the compact yet powerful 1000w performance electric drive system paired with a 36 volt Li-ion battery pack for 20 mph top speeds and plenty of torque.

Model Weight Range Mount Style Cost
36v 9ah Shrink Wrapped 4.4lbs 10-22 Battery bag with velcro straps Base Cost
36v 10ah Aluminum 7.7lbs 12-26 Sliding plate with lock +$210
36v 20ah Shrink Wrapped 10.6lbs  20-44 Battery bag with velcro straps +$330

Battery Option Overview:

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:



        • Most affordable recumbent
        • Easy mounting higher seat
        • Comfortable upright seat
        • Traditional high handlebars
        • Simple 1x7 gearing
        • Ideal for longer rides
        • 4 x water bottle mounts

          Tricycle Specifications:

          • 20" x 1.5" tires
          • Wheel Base: 42.5"-63" (126-160cm)
          • Overall Length: 68.75"-82.25" (125-209cm)
          • Width: 30.5" (77.5cm)
          • Seat Height: 20.5"-22.75" (52-58cm)
          • Weight: 57lbs
          • Weight Limit: 300lbs
          • X-Seam: 31"-53" (31-79cm)


          • 80" x 40" x 44" x 190lbs


          • 720w peak power
          • 20 mph top speed
          • 12-26 mile range
          • 36v Li-ion Battery
          • USA hand-built wheel
          • 5-level top speed control


            Watts (Nominal/Peak): 500-720w
            Top Speed: Approx. 20mph
            Range: 10-26 Miles
            Charge Time: 3hrs (0-100%)
            Weight: 21lbs (9.5kgs)


            Brand: Electric Bike Technologies
            Type: Internally Geared (brush less)
            Power: 500w nominal / >720 @36v
            Max Torque: 84N-m @36v
            Max RPM: 330 @36v
            Cable: 8" axle exit, 3-phase / 5 hall effect
            Connector: Round 8-pin 13/32" (10.4mm)
            Weight: 9.4lbs (4.26kg)


            Nominal Voltage: 36v
            Nominal Capacity: (depends on choice - 9 - 20ah)
            Battery Energy: (depends on choice - 378 - 480wh)
            Dimensions: (depends on choice)
            Total Weight: <= (depends on choice)
            Cell Assembly: 18650-3.6v-10S
            Life Cycles: >=80% Dod = 500 cycles
            Max. Continuous Discharge: 22.5A
            BMS Protection Current: 30A
            Discharge Cut-Off Voltage: 30v
            Max. Charge Voltage: 42v
            Inner Resistance: < 130mΩ
            Charge Time: <= 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
            Limited Warranty: 1 Year
            Manufacturer: Electric Bike Technologies

            UN 38.3 Certified E-Bike Battery



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