Sun EZ-3 USX HD Trike Review


The Sun EZ-3 USX is a human-powered, recumbent, three wheeled vehicle. It engages me in a way that the Segway did not. I am amazed this product, what some call a “bent trike,” is not better known.

What’s significant about the USX? It’s the most comfortable human powered vehicle ever, more comfortable than many cars. It’s safe, practical, and affordable. I hate exercise but I find myself impatient to get my next chance to ride this thing. The USX is potentially a major step forward in promoting conservation and healthy exercise in America.

Riding the USX is eerie, because it feels like relaxing on a perfect easy chair and performing aerobic exercise at once. You can go fast or slow, and both are wonderful. You can load the thing with 400 total pounds. You can pull carts. Some riders have decked out USX’s with ipod sound systems and other amenities.

There are some downsides. It’s heavy: 65 pounds. Going up hills is pleasant, but slower than on a bicycle.

Another big plus: you sit high enough to be noticed by car drivers, though I also added a flag and extra lights to err on the side of caution. Although it looks wide, and encourages cars to give more room than is commanded by bicyclists, it is actually narrow enough to roll through a standard door. You can stand it up on end so it takes minimal room when parked. You can just stop and rest while going up hill- it has a parking brake.

There are lots of other bent trikes — dozens — but most are “performance-oriented” — made for athletes. Some of the athletic brands are
ICE, HP Velotechnik and , Catrike. I have tried some of them, and I think they are fun and interesting, but not what I want. Some of them are expensive, very low slung (you’re practically on the ground while riding), and not so practical for non-atheletes. What I want is something that’s super easy to get in and out of, that’s fun to sit on while standing still, that’s high up enough to be safe around cars, and that is fun to ride slow. I want something for life, not for sport, and there’s not much competition in this niche. There is another interesting comfort-oriented bent trike, the Hase Leupus, from Germany.

Beware that sometimes enthusiast cults get lost in fantasy. The enthusiasm in the bent trike world sometimes reminds me of what happened with high-end consumer audio. Superstitions crowded out reality. People started to spend insane money on audio cables with impossible physical properties.

Even though the USX is ridiculed by some hard-core bent bike enthusiasts, it is an important product, even aside from the low price.

— Jaron Lanier
Best place to buy: Your local bike shop or
  • 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.

Leave a Reply

Your email address will not be published. Required fields are marked *