Timbren SES Suspension Enhancement System SKU# TRA5402
Timbren SES Suspension Enhancement System SKU# TRA5402
Timbren SES Suspension Enhancement System SKU# TRA5402
Timbren SES Suspension Enhancement System SKU# TRA5402

Timbren SES Suspension Enhancement System SKU# TRA5402

SKU# TRA5402

FREE Ground Shipping on Orders Over $99

Lifetime Warranty and 100-Day Money Back Guarantee

Available to ship within 1 week

Towing top-heavy loads, like your RV trailer, can impact your ability to keep the trailer moving on a straight path down the highway. This doesn’t just make for a challenging drive — it’s dangerous.

Designed exclusively for RV trailers, Timbren SES kits for trailers keep your load level at all times. This creates a safe, controlled ride so smooth, you might forget you’re towing your RV trailer altogether.

How? Our Aeon® springs deliver a progressive spring rate. As load increases, our springs push back harder, eliminating your RV trailer’s squat, sway, and roll while providing a safe, smooth ride. The natural rubber properties of our Aeon® springs also cushion road shock, reducing hard hits on your trailer from driving over bumps and dips.

This SES suspension upgrade fits your RV trailer suspension with an underslung axle setup that has a 2 ⅜-inch to 3-inch diameter axle with 2-inch wide leaf springs. Each laser cut piece of steel is precision bent and powder-coated to ensure a quality fit.

What makes Timbren SES kits different from other suspension enhancement systems? Unlike air bags, our kits require zero post-installation maintenance. And unlike other systems, you can install and haul in under 30 minutes, right from your driveway.

Key Features

  • Eliminates trailer squatting and sagging
  • Cushions road shocks
  • Improves handling
  • DIY installation
  • Zero post-installation maintenance


Rated Capacity: 8,600 lbs

Note: Even though you’re increasing the spring rate by adding this upgrade, this does not increase the trailer’s GTW (Gross Trailer Weight). Please make sure that the load does not exceed the GTW set by the manufacturer.

What's Included

  • 2 x 1" Rubber spacers
  • 2 x 1/2" Rubber spacers
  • 2 x Mounting Brackets
  • 2 x Patented Aeon® SES suspensions (hollow rubber springs)
  • All necessary hardware

How to Install

Timbren SES SKU# TRA5402 Kit.pdf

Suspension Support Location

  • Trailer Suspension

Kit Type

  • Standard Kit

Our Timbren SES kits for trailers are built to last. We back this up with a lifetime warranty.

Covered under this warranty are defects in material and workmanship, under normal use and service for the life of the vehicle on which the kit was originally installed.

Read more about our lifetime warranty

FREE Ground Shipping on Orders Over $99

Free ground shipping is available in the contiguous United States on all orders over $99. Normal processing time is between 1 – 2 business days from placing the order.

We make every effort to ship the order within this processing time; however, no guarantees are expressed or implied.

100-Day Money Back Guarantee

If you’re not happy with your Timbren product, we want to remedy that. If our customer service team can’t find a solution for you, you can return your Timbren product for a refund, a replacement product, or another product of similar value within 100 days of purchasing the product. We’ll cover return shipping costs, too.

Read more about our 100-Day Money Back Guarantee

Better than foam

See how we stack up against other suspension enhancement systems for trailers.

Timbren SES for Trailers


Rated Capacity

5,000 lbs

3,000 lbs

Best Progressive Spring Rate

DIY Install

Improved Ride Quality


No Additional Parts Needed

Lifetime Warranty

100-Day Money Back Guarantee

Your questions, answered

You want all the info before choosing the right towing solution for you. And we want to help.

An underslung axle refers to the way the leaf spring sits below the axle instead of above the axle. This gives it a lower center of gravity, allowing for more stability.

Timbren SES for trailers supports the existing trailer factory suspension system in order to reduce sag, sway, and roll while improving ride quality.

Silent-Ride and Axle-Less trailer suspensions, on the other hand, completely replace the factory suspension.

Have questions? Reach out to one of our resident suspension techs to determine which product is right for your trailer needs.

Talk to a resident suspension tech