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Electric Eco-Tad SX

  • $2,902.00

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The electric Eco-Tad SX is the most affordable Sun tadpole trike. It has a straightforward design that delivers comfort and features that exceed its lower price point.

The Eco-Tad SX has under-seat steering, a mesh and padded seat for comfort, a powerful 1000 watts of power, 26 mph top speeds, and plenty of torque to help power your ride. Available with multiple battery options to meet your range requirements. Fenders are also an excellent option for this electric recumbent trike.

What's this?
$250 Flat-Rate Shipping. Contiguous USA Only.
  • Ships Fully Assembled
  • 1yr Tire-to-Tire Warranty
  • World-Class Support


  • Most Affordable Tadpole
  • Under-Seat Steering
  • Horizontal Handlebars
  • Mesh Padded Seat
  • Simple 1x7 Gearing
  • 4 Water Bottle Mounts
The electric Eco-Tad SX tadpole recumbent trike, poised and ready to ride.



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The Eco-Tad SX is the most affordable Sun Tadpole 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.

The direct steering handlebars allow a natural hand postion for Eco-Tad SX
Comfortable Handlebars

The Electric Eco-Tad features comfortable direct-steering handlebars. This allows for a familiar, natural hand position with higher handlebars than some under-seat steering recumbents.

The electric Eco-Tad SX has dual front disc brakes for an excellent stopping power.
Dual Disc Brake

The Electric Eco-Tad features independently controlled dual front disc brakes – this gives safe, long-lasting brake performance.

The large, easy to ready LCD disdplay on the electric Eco-Tad SX.
Easy-To-Read LCD Segment Display
The Electric Eco-Tad features an easy-to-read backlit display with large text on an articulating mount. This advanced segment LCD includes a battery meter, speed, trip distance readout, and programmable top speed limit.
The simple 1x7 gearing provides all the gearing you'll need on the electric Eco-Tad SX.
Simple 1x7 Gearing
Even if it's been a while since you rode a bike, you'll appreciate the Eco-Tad's simple 1x7 gearing. This system means every gear you need is available at the click of the wrist. No need to worry about double shifting or gear combinations!
This 500-1000 Watts E-BikeKit rear geared hub motor has a powerful 84N-m of torque.
500-1000 Watt Geared Hub Motor
The 500-1000w E-BikeKit rear geared hub motor features impressive 84Nm torque and a USA handbuilt wheel with single-butted 12-13 gauge spokes for durability.
This thumb throttle allows you to engage the motor on the electric Eco-Tad SX
The easy-to-use thumb throttle allows you to engage the motor whenever you need it. Use the throttle to boost forward at a stop position or help get up it to cruising speed. The Eco-Tad also features a pedal-assist sensor (PAS) for operation.

How to Measure Your X-Seam

At Electric Bike Store, 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.

how to check your x-scale

Alternatively, if you like reading and diagrams...

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 measurement instead of the board.


An overall measurements of the Eco-Tad SX
  • A: Handlebar Rise

  • B: Standover Height

  • C: Seat Length to Pedal

  • D: Seat Height to Ground

  • Recommended Rider Height

The length and width of the electric Eco-Tad SX


$250 Flat-Rate Shipping.
The Contiguous USA Only.

Sales Tax
Sales tax will be applied by state where applicable.

SHIPS 100% FULLY ASSEMBLED from Our Warehouse in Bucks County, PA
The tricycle is enclosed in a heavy cardboard box and fastened to a custom-built shipping pallet. Shipping is by freight truck with liftgate service included.

We use a variety of freight carriers based on your shipping destination. When the trike ships you will receive an email from us with tracking information. The freight company will contact you before the final delivery is made in order to arrange the drop-off with you.

The electric tricycles we offer are high quality tricycles assembled by professionals with years of experience, and we stand behind each electric tricycle we build and ship. If, for any reason, after purchasing your electric trike, you are not 100% satisfied, simply contact customer service to discuss the return.

IMPORTANT: Buyers may return any undamaged and unused products (including fully assembled electric tricycles) within 30 days of delivery for a refund minus a 25% restocking fee (based on the condition of the returned item and at the sole discretion of EBT). ACTUAL ORIGINAL SHIPPING CHARGES (not the flat-rate $250), AND RETURN SHIPPING CHARGES (back to our facility) ARE THE SOLE RESPONSIBILITY OF THE BUYER. These return shipping costs can be significant. It is also imperative that you retain the shipping pallet and box should you decide to return a complete tricycle. If these packing items are discarded, the return will become that much more complicated and expensive.

For more information on Returns, Shipping Charges and refunds please visit our Terms & Conditions.

Transit Times
Approximate transit times start once the parcel leaves our Croydon, PA warehouse.
    East Coast: 2-4 Business Days
    Midwest: 3-5 Business Days
    West Coast: 5-7 Business Days

With liftgate service, the truck can only lower the pallet to the ground, they cannot deliver it inside your house. You will need to open the box and dispose of the pallet afterward.

Shipping Size
80" x 40" x 44" and 190 lbs

Please note this custom electric trike is currently shipping without a user manual. The specifications sections should also provide most of the information you'll want to know. If you have any questions, suggestions, or additional information that you would like to see posted, please let us know.

If you have any questions, please contact us at 
Tel: +1 800.215.1976  or  


  • Top Speed

    26 Mph (w/ Programmable Limit)
  • Range

    10-44 Miles (Depends on the Battery Choice)
  • Motor

    E-BikeKit Rear Geared 500-1,000 Watts, 84Nm, 320 rpm (48v)
  • Motor Weight

    9.4 lbs
  • Battery

    48v 9Ah, 48v 10Ah, or 48v 20Ah
  • Max Payload

    300 lbs (Including Rider and Cargo)
  • Charge Time

    4.5-5 Hours (From 0-100%)
  • Charger

    48v 2A – 48v 4A
  • Colors

    Navy, Blue, and Red
  • Intended Use

    Neighborhood, Cruising, Paved Trail, and Urban
  • Drive Mode

    Throttle-on-Demand and Pedal-Assist, 5-Level Speed Control, Programmable Speed, Current Limit, and Assist Level
  • Frame Material

    High Tensile Tig Welded Steel
  • Fork Details

    High Tensile Steel, Rigid
  • Suspension

  • Rims

    Alloy, 36-Hole Doubled-Wall w/ Eyelets
  • Spokes

    (F) 14 Gauge, Stainless Steel / (R) 12 Gauge, Single-Butted, Stainless Steel
  • Tires

    Kenda Kwest, 20” x 1.5” at 40-65 psi
  • Saddle

    Steel Frame 1pc, Sunlite Padded/Mesh Back w/ Bottle Braze-on
  • Brakes

    (F) ProMax Mechanical Disc Brakes w/ 160mm Rotors
  • Brake Lever

    Includes E-brake Shutoff and Parking Lock, and One Lever for Each Front Wheel
  • Handlebar

    Chromoly Steel w/ 22.5mm Diameter / Bottle Baze-ons
  • Grips

    EBT Grips – EVA Rubber
  • Shifter

    SunRace Grip Shift
  • Display

    E-BikeKit 2017 LCD
  • Front Derailleur

  • Rear Derailleur

    SunRace RD-M37
  • Cranks

    Single Alloy, 170mm Length w/ 38t Chainring
  • Chain Guard

  • Pedals

    Wellgo R199, Alloy Cage
  • Gearing

    Shimano 7-Speed (1x7) / 14-28t Cassette
  • Lights

  • Fenders

    Optional: Front and Rear Set, Black High ImpactPlastic w/ Stainless Steel Stays
  • Basket

    Optional: Steel, Black Vinyl Coated: 16.5" Length x 13.5" Width x 9" Deep
  • X-Seam Range

    29”-49” (Smaller Sizes May Require Modifications)
  • Wheelbase

  • Overall Length

    70.5”-78.75” (Depends on Riders X-Seam Set-up)
  • Max Width

  • Ground Clearance

    10” (From the Bottom of the Steering Linkage to the Ground)
  • Turning Radius

    6' approx.
  • Overall Weight

    68-78 lbs (Depends on the Battery Choice)


Model Weight Range Mount Style Cost
48v 9Ah 5.8 lbs 10-22 Miles Battery Bag with Velcro Straps Base Cost
48v 10Ah 9.7 lbs 12-26 Miles Sliding Plate with Lock +$286
48v 20Ah 14 lbs 20-44 Miles Battery Bag with Velcro Straps +$366
  • Nominal Voltage

  • Nominal Capacity

    9-20Ah (Depends on the Battery Choice)
  • Battery Energy

    490-1092Wh (Depends on the Battery Choice)
  • Dimensions

    Depends on the Battery Choice
  • Total Weight

    < = Depends on the Battery Choice
  • Cell Assembly

  • Life Cycles

    > = 80% Dod = 500 Cycles
  • Max Continuous Discharge

  • BMS Protection Current

  • Discharge Cut-Off Voltage

  • Max Charge Voltage

  • Inner Resistance

    < = 50mΩ
  • Charge Time

    < = 3.3 Hours (From 0-100%)
  • 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

    Aluminum or Vinyl w/ Canvas Bag (Depends on Battery Choice)
  • Battery Weight

    5.8-14 lbs (Depends on the Battery Choice)
  • Assembled Pack Certificates

    UL; UN38.3; MSDS; RoHS; SGS
  • Limited Warranty

    1 Year
  • Manufacturer

    Electric Bike Technologies, Inc.


If you already have a Sun Seeker Eco-Tad and want to convert it to electric, we offer conversion kits at, including kits specifically for the Eco-Tad:

Conversion Points

Financing Options NOW Available!
Customer Reviews