Sun EZ-3 Tri Classic SX Trike Review


Sun Bicycle has been building adult tricycles for over forty years and has become the largest seller of adult tricycles in the world.  I personally know Jack and Ben, at Sun Bicycle, and there are no harder working guys in the bike business.  Sun Bicycle’s philosophy has always been good quality at a low price and they stand behind the product.   

The Sun EZ-Tri Classic SX trike is a nice entry level delta style trike. This trike has some of the same great features as the other Sun recumbents, just at a lower price point. One of the most loved features is the adjustable super soft gel seat and mesh back support.  The seat is wide and just shaped right for your bottom, no matter if you are skinny or much more padding of your own.  The seat back support is contoured for your lower back and can be adjusted for your personal taste with the nylon mesh straps on the back of the seat.  The seat frame can accommodate two water bottles and is designed to accommodate people up to 300 lbs.  The seat can be easily adjusted by the two quick releases under the seat without using any tools.  The seat angle can be adjusted without any tools as well, using the two spring clips on the seat stays.

Sun was able to keep the cost low by making the frame out of steel, compared to aluminum.  I will have to say that the Tig welding is very precise, performed cleanly and consistently.  The Chain Idler is well done and securely welded to the frame to stop the chain from bouncing too much.  The Sun EZ-Tri Classic SX comes with 100 psi, low rolling, resistance Kenda Kwest tires for an incredibly smooth, fast and effortless ride.  The Shimano 21 speed drive train really gives you enough gears to conquer just about any hill you can find.  Stopping the Sum EZ Tri Classic trike is performed by a powerful rear-wheel disc brake and a linear-pull front brake which worked flawlessly.  The brake levers come with a parking brake button so you can park on a hill and have no worries about your trike rolling away.  The handlebars have a comfortable bend and have attachments to carry two water bottles. 

  Though the Sun EZ-Tri Classic SX is designed with comfort in mind, the trike is perfect for intermediate and casual riders looking for some light touring, commuting or just plain bike path fun.

Pros: A very comfortable seat bottom, easier to get on and off of compared to a tadpole style trike, low price.

Cons: A little more tippy than a Tadpole style trike.

Best place to but: Your local bike shop or

Industrial Bicycles, Buy Now!
  • Wheel Base: 56.5″ (143cm)
  • Overall Length: 73″ (185cm)
  • Width: 30.5″ (77.5cm)
  • Seat Height: 22″ (56cm)
  • Weight: 56 lbs
  • Weight Limit: 300lbs
  • X-Seam 32-48″
Specifications As of 2013
High Tensile Steel, TIG-Welded
High Tensile Steel, TIG-Welded
Steel, Caged Bearings, Sealed, 25.4 x 34 x 30mm, Black
Steel w/2 Bottle Braze-ons
Alloy, 22.2 x 240mm Quill x 40mm Ext., Black
2-Tone Kraton Gel
Front Brake Lever
Alloy, Linear Pull, Black/Silver
Rear Brake Lever
Alloy, Linear Pull, Black/Silver
Front Brake
Alloy, Linear Pull, Black
Rear brake
Single Mech. Disc
Front Shifter
Sram MRX 3-Speed Grip Shift
Rear Shifter
Sram MRX 7 Speed Grip Shift
Front Derailleur
Microshift, DP, 31.8mm Clamp
Rear Derailleur
Shimano Tourney, Black
Fixed Sprocket 15mm x 20T
Rear Axle
Rear Axle EZ3/X3 SX
Contoured Foam w/Tri-Color Cover
Seat Mesh
Cool Mesh Seat Back
Seat Back
Cool Back Steel w/2 Bottle Mounting Points
Seat Cover
Tri-Stitch, Permanent
Seat Mount
Steel 1″ Black
Seat Mount Binder
QR M6x50mm Alloy
Seat Back Pivot Bolt
10mm, Chrome
Upper Strut
Steel 150mm Black
Upper Strut Bolt
Upper Strut Washer
Curved Nylon Washer
Lower Strut
Steel, Clamp Type, 240mm BLK
Strut Clamp
Pin with QR
Crank Set
Alloy 170×48/38/28 (steel rings)
Bottom Bracket
Sealed Cartridge, 68 x 118mm
1/2″ x 3/32″, Sil/Gry, (218 Link Total)
Chain Guide
Single Guide Wheel
Chain Guide Hardware
Guide Wheel Hardware Double
Resin Pedals, 9/16″
Front Hub
Alloy, 28H x 14G with Q/R Axle, Black
Rear Hub
Trike, Pinned Steel, 36H, Black
Front Rim
16 x 1.5-1.75″ Alloy SL 36H
Rear Rim
20 x 1.5-1.75″ Alloy SL 36H
14G Stainless Steel with Brass Nipples, Black
Front Tire
16×1.50 BW Kenda Kwest 60psi
Rear Tire
20×1.50 BW Kenda Kwest 60psi
56 Lbs.
17 comments on “Sun EZ-3 Tri Classic SX Trike Review
  1. Terry colligan says:

    Where can we try the bike and who carries it? Live in Casa grande az

  2. leo klebanow says:

    What difference is there with two wheels in the back or front?

    • brian says:

      The trike with two wheel in the front are the most stable and the trikes with the two wheels in the rear are the easiest to get on and off of.

  3. Sheilana says:

    I’ve had mine over a year & enjoy every ride; comfortable seat & back, completely adjustable. Ride a least 7 miles most days at 83 years young!

  4. GINNY Kraft says:

    weight? sound heavy (steel frame)

    can you add a motor, if and how; cost?

    • brian says:

      If you want to add a motor Look at the True Bicycles Quest, It come with a 20″ front wheel which will work better.

  5. Sally says:

    any trike for people with 27″ inseam?

  6. Pam says:

    Where can we try the bike and who carries it? Live in Clearwater, Florida

  7. liz says:

    36″ inseam would this trike be too small for me, i am 6′ tall

  8. Carol says:

    Any idea how much a sun trike ez-3sx is? Cant find prices on any site

  9. M.L.Kamath says:

    I like it very much.Few questions safe is the bike
    2.I am looking for only as an exercise bike. W would ride 10 to12 miles per day.Is it a good bike for me.
    3What would be the cost?
    4.I love in Ft. Myers Florida.where is the nearest dealer in this area

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