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Model SJ-8531
5' x 8' Trailer
with 12" Tires
What are the benefits of owning a RedTrailer?
    hub with grease fitting
  1. All RedTrailer hubs have a grease fitting in the back of the hub for easy lubrication.

  2. This model has three-leaf axle springs for better suspension (most similar trailers have two-leaf axle springs).

  3. RedTrailer couplers are mounted on square steel tubing, not a flat metal plate — that's an important safety feature.

  4. RedTrailers have a center support beam that is 48" x 2-1/2" x 2" with two 18" support brackets, for greater stability and safety.

  5. Every RedTrailer comes with a Manufacturer's Certificate of Origin (MCO) so that you can easily get a license plate for your trailer. Some companies don't provide this very important document.
RedTrailer kits are easy to assemble!
  • A few end wrenches, a pair of pliers and a screwdriver are all that's needed.

  • RedTrailers have pre-drilled holes on the top of the frame rails to attach flooring material.

  • In most cases, assembly can be completed in approximately 2 hours.
What Makes RedTrailers Better?

Many people visit our website, then tell us that they've seen "the same trailers" for sale elsewhere on the Internet – at lower prices.

Well, to put it simply, they've been fooled!

It's true that there are similar trailers available elsewhere, but don't make the mistake of thinking that all folding utility trailers are the same!

RedTrailers are uniquely designed and manufactured to our exact specifications. So if you're buying a folding trailer kit, make sure that it's a genuine RedTrailers brand trailer.

Here's how you can spot the difference:

Notice the difference in the tongue design. RedTrailers have a center tongue support tube that provides greater strength (and greater safety) while towing. The RedTrailers coupler is securely mounted to the end of the 50-inch steel support tube, while the "Brand X" coupler is simply bolted to a lightweight flat metal plate.

And beware ... some unscrupulous vendors have been known to include pictures of RedTrailers in their advertisements, even though they're not selling genuine RedTrailers! So before you purchase one of their "bargain" trailers, be sure to inquire about the tongue design!

RedTrailers also come complete with a Manufacturer's Certificate of Origin (MCO) that simplifies the process of registering the trailer for use on the road. Without the MCO, many states require an elaborate certification process that can delay the registration of your trailer by weeks, or even months!

Don't forget that we also carry a full line of replacement parts for your RedTrailer, and a wide variety of other parts and accessories, too!

SJ-8531 Specifications

Optional Accessory:
Tongue Extension
  • Bed Structure - 5' x 8'
  • Deck to Coupler Clearance - 38"
  • Coupler Height When Level - 15"
  • Ground Clearance (Axle) - 9"
  • Overall Width Including Fenders - 75"
  • Height When Folded for Storage - 86"
  • Axle - 1.5" C-Channel Steel
  • 3-Leaf Axle Springs
  • Weight of Trailer - 263 lbs.
  • Max Load Capacity - 1187 lbs.
  • Gross Axle Weight Rating - 1450 lbs. Using Supplied Tires & Rims at 60 PSI Cold
  • Gross Vehicle Weight Rating - 1450 lbs. (can be upgraded to 2000 lbs.)
Optional Accessory:
Tailgate Ramp
  • D.O.T./C.S.A. Compliant Stop, Turn, Tail & Running Light Assemblies
  • D.O.T./C.S.A. Compliant Amber Running Lights
  • 4-Flat Trailer Wiring Connector
  • 16 Ga Wire Throughout
  • 1-7/8" Latch Closure Steel Coupler
  • Class I, 2000 lbs Max Rating
  • Bolt-On Safety Chains
  • Recommended Accessory: Coupler Lock
Recommended Accessory:
Spare Tire
  • 1.5" x 3" x 2.5mm C-Channel Frame Structure
  • 2.5" wide x 2" high Tongue
  • 8 Steel Stake Pockets
  • Durable Black Powder Coat Enamel Finish
  • Painted 12 x 3.75 Steel Rims
  • 4-Bolt EasyLube Hubs
  • 4.8-12 (B) Tubeless Tires
RedTrailer storage is a snap!

  • Once assembled, RedTrailer Folding Trailers simply fold up for easy storage in a compact area of any garage, barn or shed.

    1. Unscrew the bolt that secures the rear side rails.

    2. Fold the rear of the trailer over onto the front.

    3. Tilt the trailer onto the storage casters.

    4. Remove the crossmember bolt and fold down the tongue.

  • The RedTrailer now rolls easily to its storage position on built-in casters!

Easy loading and unloading!

  • RedTrailer Folding Trailers can be tilted while hitched, making it easy to load and unload the trailer.


Great for Teardrop Trailers!

  • Many teardrop trailer enthusiasts have used RedTrailer Folding Trailer Kits as a base for building their teardrop camping trailers.

RedTrailer kits easily accept stake sides!

Detailed Instructions: Instructions require the free
Adobe Acrobat Reader.

T. Rodgers of Spring, TX writes: "I have the trailer together ... Came out great and I'm real happy with it. I will be glad to recommend your trailer. Your customer service and support has also been fantastic! Thanks for all your help."

D. Lynch of Columbus, IN writes: "I called this afternoon to possibly order a motorcycle ramp/rail kit so that I could adapt my automobile Tow Dolly into a motorcycle trailer to tow my Yamaha Star (1100 cc) motorcycle. I'm glad I talked with you! Although my design may have looked good in the driveway, I would have been headed for trouble. Tim explained to me the risks that I would be taking and that my driveway design probably would have "bounced" down the road behind my motor home or behind my car. I'll take another look at your website and think about a professionally built trailer designed to do what I had in mind. Thanks again for the professional information."


Trailers cannot be shipped outside the contiguous United States. Once shipped, trailers are usually delivered in 7 business days or less. We cannot ship to a P.O. Box address.

Please note that you can SAVE on shipping charges by having your trailer delivered to a commercial address. Many freight carriers apply a surcharge for deliveries to residential addresses. You can avoid this surcharge by asking us to deliver your trailer to a commercial address (perhaps to your place of employment, or to a friend's business).

Order Your RedTrailer

Model SJ-8531

5' x 8' trailer
with 12" tires

Upgrade Option:

Upgrade your trailer's towing capacity with kit RT75 (includes 13" tires) for an extra US$391.54
Upgrade your trailer's towing capacity with kit RT75-950 (includes 12" aluminum wheels and radial tires) for an extra US$349.54
Do Not Upgrade
Shipping Option:

delivery to a residential address
delivery to a commercial address


SAVE shipping costs with our
Customer Pickup Option:

You can pick up your RedTrailer at the warehouse in San Marcos, CA (see box dimensions here).

Just reserve your trailer now by clicking the Customer Pickup button to the right, and we'll email you with pickup instructions as soon as your order has been processed.

CHECK THIS BOX to have your trailer
ASSEMBLED for an extra US$150.00
(assembled trailers cannot be shipped)
pickup price
pickup location:

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