Electric EZ-3 USX HD

  • $ 2,682.00

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The electric EZ-3 USX HD provides the stability and comfort of a recumbent trike while offering more thrills. The HD stands for heavy-duty, with 110psi tires, 48 spoke wheels and a 400lb load capacity. The direct-drive motor is also HD and designed for heavier applications with 1000 watts of power.

Ideal for larger riders, the EZ-3 USX HD has a powerful braking system, mid-frame suspension, cambered rear wheels and under-the-seat steering. Available with multiple battery options, optional rear fenders and basket.

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


    • Low center of gravity
    • Stable cambered rear wheels
    • Heavy-Duty 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 and front v-brake



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    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 110psi tires, 48 spoke wheels with double-wall rims. The direct-drive motor is also heavy-duty and designed for heavier loads with 1,000 watts of peak power.

    Advanced Mid-frame Suspension

    The mid-frame coil-over suspension on the EZ-3 HD helps smooth the roughest roads and keeps you riding when other trikes would give up.

    Heavy-Duty Construction

    With 48-spoke double-wall alloy rims, high pressure tires, dual rear disc brakes and front v-brake, the EZ-3 HD is built for a 400lb capacity with a low center of gravity.

    Easy-To-Read Segment Display
    The EZ-3 HD features an easy-to-read backlit display with large text mounted on the handlebars. This advanced segment LCD includes a battery meter, speed and trip distance readout, and programmable top speed limit.
    Cambered for Stability
    The EZ-3 HD's Frame Geometry Features cambered rear wheels – this adds extra stability for easy and safe cornering by tilting each rear wheel inward towards the center of the frame by 2 degrees.
    Heavy-Duty Direct-Drive Motor
    The 500-1000w E-BikeKit motor is capable of puling over 300lbs and is laced into a USA handbuilt wheel with single-butted 12-13 gauge spokes for durability. This motor is seriously heavy-duty.
    Thumb Throttle
    The EZ-3 HD features an easy-to-use thumb throttle, so you can get power when you need it. The integrated pedal-assist sensor can also give you a boost to augment your pedaling.

    How to Measure Your X-Seam

    At Electric Trike 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.

    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 to take the measurement instead of the board.


    • A: Handlebar Reach

    • B: Standover Height

    • C: Seat Height to Pedal

    • D: Seat Height to Ground

    • Recommended Rider Height



    $250 Flat-Rate Shipping.
    Contiguous USA Only.

    Orders shipping to PA will be subject to sales tax.

    Ships fully assembled from our warehouse in Bucks County, PA. The trike is enclosed in a heavy cardboard box fastened to a shipping pallet, delivered by motor freight truck with liftgate service. 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. Tracking is less precise than UPS or FedEx. The freight company will contact you before the final delivery is made in order to arrange the drop-off with you.

    Delivery Time:
        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 afterwards.

    Shipping Size: 80" x 40" x 44" / 190lbs

    Please Note: This trike ships with the E-BikeKit user manual for details on the electric-drive system and also with the Sun official manual for the trike itself. The video section above contains assembly instructions and tips for getting started and using your new electric bike. The specifications sections should also provide most of the information you'll want to know. If you have any questions or suggestions of additional information you would like to see posted, please let us know. Official manuals are in development, and once completed, they will be offered to customers that request them.

    If you have any questions, please contact us at 
    Tel: +1 800.375.0224  or  
    Email: support@electrictrike.com


    • Top Speed

      20mph (With programmable limit)
    • Range

      10-44 miles (Depends on battery)
    • Motor

      E-BikeKit front heavy duty direct-drive 500w-720w, 31Nm, 259rpm (48v)
    • Motor Weight

    • Battery

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

      400lbs (With rider and cargo)
    • Charge Time

    • Charger

      48v 2A – 48v 4A
    • Color

    • Intended Use

      Neighborhood, Cruising, and Urban
    • Drive Mode

      Throttle-on-demand and pedal-assist. 5-level speed control, programmable speed limit, current limit, and assist level.
    • Frame Material

      Tig Welded High-Tensile steel
    • Suspension

      Mid-frame suspension
    • Rims

      Alloy double-wall / (F) 36 hole / (R) 48 hole heavy-duty
    • Spokes

      (F) 12-13g single-butted stainless steel / (R) 14g stainless steel
    • Tires

      Maxxis Hookworm, 20” x 1.95” at 110psi max
    • Saddle

      Sunlite heavy-duty padded seat with mesh back / adjustable backrest angle
    • Brakes

      (F) ProMax V-brake / (R) WinZip Mechanical Disc Brakes w/ 160mm rotor
    • Brake Lever

      Includes e-brake shutoff and parking lock for front wheel front wheel, and one dual-pull lever for both rear wheels
    • Grips

      EBT Grips – EVA Rubber
    • Shifter

      SRAM Grip Shift 3.0
    • Display

      E-BikeKit 2017 LCD display
    • Front Derailleur

    • Rear Derailleur

      Sram X3
    • Chain Guard

    • Gearing

      Shimano 21-speed (3x7) / 30/42/52t Chainrings / 13-28t Cassette
    • Pedals

      Wellgo, alloy cage pedals w/ 9/16” thread
    • Lights

    • Fenders

    • Basket

    • X-Seam Range

      29”-49” (Smaller sizes may require modification)
    • Wheelbase

    • Overall Length

    • Max. Width

    • Ground Clearance

      3” (Rear Derailleur)
    • Overall Weight

      61lbs-71lbs (Depends on battery type)


    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
    • Nominal Voltage

    • 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

    • 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
    • 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


    If you already have a Sun Seeker EZ-3 HD and want to convert it to electric, we offer conversion kits at E-BikeKit.com, including kits specifically for the EZ-3 HD:

    Conversion Points:

    Financing Options NOW Available!
    Customer Reviews