Sun EZ-3 USX HD Trike Review



Sun Seeker EZ-3 USX HD Review on December 17, 2020

Every trike has it place and every person can find the perfect trike for their needs by doing there home work.  The Sun Seeker EZ-3 USX HD can be the perfect trike for someone who is mobility challenged or over 300 pounds.  The HD at the end of the USX name stand for Heavy Duty and that is exactly what this trike is all about. Sun Bicycle the manufacture of the USX HD is the largest manufacture of adult triycles in the world and have been building trikes for over fifty years.  Sun trikes are at the lower end of the market cost wise compared to other brands yet still offer good quality.

Frame: The frame is TIG welded together out of steel and is heavy and a bit overbuilt compared to other trikes on the marker.  The USX HD is capable of carry very heavy loads; you should have no worries about the durability of this frame no matter how heavy the rider.

Paint: Any color you want as long as it is silver.  The paint is more the adequate, sprayed on evenly with a nice finish. The paint should last the life of the trike even if you live in a harsh weather environment.

Drive Train:  The Drivetrain is a 21 speed Shimano with a grip type shifter.  The Drivetrain is an entry level Shimano and works adequately for an entry level rider.

Brakes: The Sun USX HD has unique brake system where the right brake lever controls both the rear brakes.  The rear brakes are disc that are attached to each wheel.  The left brake lever controls the front brake and both brake levers have a parking lock.  For people with special needs the brakes can be switched from left to right or if someone just prefers to have the rear brakes controlled by there left hand it can easily be switched.  The brake have good stopping power and stop the trike sufficiently while not marking the trike pull to one side or the other.

Seat: People find the seat on the Sun USX HD very much to there likening.  The bottom is very wide and uses a very nice soft gel material.  The seat back is independent from the bottom so the back can be positioned very upright if someone so desires.  The seat back is made from a very breathable mesh so your back should not get hot and sweaty.

Wheels: This is where most problems happen with trikes. The Sun USX HD wheels are exceptional, and I will go so far as to say that they are the strongest recumbent wheels on the market period.  The Sun wheels have 48 spokes per wheel where most trikes have 32 or 36 spokes per wheel.  The rims on the Sun USX HD are also wider and heavier duty than rims on other brand trikes.  Sun also chose a premium tire the Maxis Hookworm which is wider and more durable than most tires used on other trikes. The Hookworn tire has a smooth tread to improve the roll of the trike an can be inflated all the way up to 110 Psi.   Sun also chose a heavier duty read axle which can withstand significantly more punishment than standard diameter axles.

Ride: The Sun USX rear wheels are cambered giving the trike increase stability when cornering. The USX frame is hinged in the middle with a shock absorber which smooths out the ride considerably over a rigid frame.  The trike handled well and the steering had a light feel to it. I am sure Sun Seeker had a target person in mind when they were designing this trike.   The trike can fit people and X-Seam between 36 and 47 inches.

In conclusion: I think this trike could be a good choice for someone over 300 Lbs, if you weigh less than 300 Lbs you should probably look at some lighter more efficient trikes.

Pros: Full Suspension, Strong, Durable, dependable, comfortable and built to last.

Cons: Heavy and slow, handlebars feel a bit awkward on the placement if the seat is in a very upright position.  Not stable on down hill compared to a tadpole style trike.
Best place to buy: Your local Sun Bicycle shop or on line at

  • 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″
Frame Type: Unisex Frame Size: 36-47″ X-Seam
Frame Color: Ultra Silver Wheel Size: 20″
Rim Color: Black Overall Length: 78″ (198cm)
Gearing: 21 Speed Brakes: Disc/Rim Brake
Frame Standover: n/a Min Seat to Ground: 18″
Min Seat to Pedal: 36-47″ Bike Weight: 65 Lbs.
Rider Weight Limit: 400 Lbs.
  • Wheel Base: 59.5″ (151cm)
  • Overall Length: 78″ (45cm)
  • Width: 32″ (81cm)
  • Seat Height: 18″ (145cm)
  • Weight: 65lbs
  • Weight Limit: 400lbs
  • X-Seam: 36-47″
Variations (Click the variation for more info)
Sku: 68611    Ultra Silver
High Tensile Tig Welded Steel
High Tensile Tig Welded Steel
Integrated Sealed Mechanism Steel
Steel Underseat
Ahead w/Steering Tab
2-Tone Kraton Gel
Front Brake Lever
Promax Aluminum w/Lock
Rear Brake Lever
Aluminum Linear Dual Pull
Front Brake
Promax Aluminum Linear Pull
Rear brake
Winzip Dual Mech. Disc
Front Shifter
Sram MRX
Rear Shifter
Sram MRX
Front Derailleur
Rear Derailleur
Shimano 14-34 7sp
Contoured Foam w/Tri-Color Cover
Seat Back
Cool Back Steel w/2 Bottle Mounting Points
Seat Mount
Crank Set
Alloy 170×52/42/30 (steel rings)
Bottom Bracket
Alloy Cage
Front Hub
Alloy Q/R
Rear Hub
Keyed Alloy Trike
Front Rim
Alloy Double Wall
Rear Rim
Alloy Double Wall
14g. Stainless Steel
Front Tire
20×1.95 BW Maxxis Hook Worm 110psi
Rear Tire
20×1.95 BW Maxxis Hook Worm 110psi[bestwebsoft_contact_form]
13 comments on “Sun EZ-3 USX HD Trike Review
  1. Joe says:

    I really enjoy riding my EZ-3 USX Last year I rode over 900 miles. Great Trike


  2. David Beard says:

    I just was given this trike and I love it. I need to accessorize it now.Any good places to check into?

  3. I am in total agreement with you on this..My wife and I both ride this model and love it…

    • brian says:

      The derailleurs are different. The quality level on the Stowaway is a bit better and you can feel the difference.

  4. Channie says:

    Thank you for the deal information on the Sun EZ-3 USX HD Trike. I am currently looking to purchase a trick in the very near future and this information was especially helpful. This one is definitely moving to the top of my list.

  5. Kevin says:

    Test ride it. But beware that first impressions change. I bought one for my wife because it was the only delta trike that would work for her and we have a friend who owns three and loves it. My wife is just getting back into exercise and bike riding after some health problems and it was no contest as two which trike to purchase.
    Now, I have become enamored with delta trikes for a number of reasons. But, I desire one that is more performance based. I have ridden this trike for 132 miles now. My first ride was up the road I live next to which is about a 4% gradient. I tried to ride it like I would be bicycle powering up the hill. The front wheel felt light and the trike pulled to the left on each pedal stroke. I didn’t like it. However, as I rode it more, I realized that “powering” it up the hill is not how to ride it. I now downshift and spin at a higher cadence and I notice no wheel hop and no pulling to the left. It was just learning how to ride it. The more I ride it, the more I like it.
    The reality is that it is 65 lbs, but the gearing goes low enough that I can easily climb up to about 9% gradient (I haven’t tried steeper). This is a great utility trike for everyday riding and casual cycling with social groups. It is not, however, a performance trike. It is just too heavy and the gearing is too low. For a performance trike of the delta style, the Hase Kettwiesel or Green Speed Anura is the way to go – if you can afford to pay more than twice as much as the Sun.

  6. stuart snider says:

    How much is it??? DON’T hide the price! It’s a putoff for the brand and I’m not buying.

  7. Paul Hinkson says:

    Can anyone explain how to fold it – I cannot find the reference thanks

    • brian says:

      The USX HD does not fold. If you need folding look at a tadpole style of trike from ICE, Hp Velotechnik, Trident, Tw-Bents, Catrike all have folding trikes.

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