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Timbren Industries FR350SDF Rear Suspension Enhancement System

Manufacturer

Timbren Industries

<h3>About Timbren Industries</h3><p>Timbren Industries is a privately held, family-owned company headquartered in Whitby, Ontario, Canada, with a story rooted in a single bold idea: that vehicle suspensions could — and should — work better. Founded in 1968 when entrepreneur Arnold Heron acquired the North American patent rights to a novel hollow rubber spring design known as &quot;Aeon,&quot; Timbren has spent more than 55 years turning that insight into a lineup of suspension upgrade products trusted by weekend haulers, fleet operators, and off-road enthusiasts alike. The company name itself is a nod to family roots — a combination of the names of Arnold's two children, Tim and Brenda.</p><h3>The Aeon® Rubber Spring Advantage</h3><p>At the heart of every Timbren product is the proprietary <strong>Aeon® hollow rubber spring</strong>. Unlike conventional steel leaf springs, which operate at a fixed linear rate, or air suspension systems that require ongoing pressure monitoring and maintenance, Aeon® springs feature a <strong>progressive spring rate</strong> — meaning they work harder as the load increases. The result is a suspension that stays calm and controlled under heavy towing or hauling, yet rides smoothly when the truck is empty. The self-damping properties of the rubber also act similarly to a shock absorber, cushioning road impacts without any additional components.</p><p>This &quot;install it and forget it&quot; philosophy is a key reason Timbren has earned a loyal following. There are no air lines to route, no pressure gauges to check, and no risk of a sudden air leak leaving you stranded with an unstable load on the highway. Every SES kit is engineered to bolt directly onto factory suspension mounting points, making most installations achievable in a driveway without specialty tools.</p><h3>Product Lineup: From Work Trucks to Off-Road Trails</h3><p>Timbren's flagship <strong>Suspension Enhancement System (SES)</strong> product line covers a vast range of vehicles — from compact SUVs to heavy-duty pickups and commercial rigs. The <a href="/13739-timbren-industries-suspension-rubber-helper-spring-kit-14989">Suspension Rubber Helper Spring Kits</a> represent the core of this lineup, replacing OEM bump stops with Aeon® springs that actively engage under load to level the vehicle, reduce squat, and improve towing stability. For trucks equipped with traditional leaf spring rear suspensions, Timbren's <a href="/13739-timbren-industries-leaf-helper-spring-15009">Leaf Helper Springs</a> integrate cleanly with the existing pack to add progressive-rate support without altering ride height when unloaded.</p><p>For drivers who prefer or already run an air suspension setup, Timbren's <a href="/13739-timbren-industries-air-suspension-helper-spring-15005">Air Suspension Helper Springs</a> can complement the existing system, providing a reliable rubber backup that adds stability regardless of air pressure fluctuations. Off-road enthusiasts will appreciate the <a href="/13739-timbren-industries-suspension-multi-purpose-bump-stop-15895">Suspension Multi Purpose Bump Stops</a> — Timbren's Active Off-Road Bumpstop line — which soften the bone-jarring jounce that occurs when a vehicle bottoms out on rough trails, keeping occupants comfortable and suspension components protected. Timbren also produces <a href="/13739-timbren-industries-coil-spring-support-10882">Coil Spring Support</a> solutions for vehicles with independent front and rear coil suspension setups, broadening their coverage across modern truck and SUV platforms.</p><h3>A Legacy Built on Innovation and Reliability</h3><p>Timbren's products have found their way onto everything from daily-driver pickups to Mack and Kenworth big rigs, a testament to the scalability and durability of the Aeon® design. The company backs every SES kit with a <strong>Lifetime Warranty</strong> and a 100-Day Satisfaction Guarantee, reflecting decades of confidence in the technology. Whether you are towing a fifth-wheel camper, hauling a contractor's payload, or navigating rocky back-country trails, Timbren Industries offers a suspension solution engineered for the real world — not just ideal road conditions.

Part Number

FR350SDF
07/13/2036 12:46 PM
Sale Price

$398.07

3 left at this price

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Usually delivered within 2 days

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Product Details

The Timbren FR350SDF Suspension Enhancement System is a rear suspension upgrade kit designed to eliminate sagging, improve load handling, and enhance ride quality. This professional-grade kit features patented Aeon hollow rubber springs that deliver progressive spring rate technology, automatically adjusting to varying loads and road conditions without any driver intervention.

Key Features:

  • 8,600 lbs load capacity per pair for heavy-duty towing and hauling
  • Patented Aeon hollow rubber springs with progressive spring rate
  • Eliminates rear-end sag, squat, and sway under load
  • Maintenance-free operation - no air lines, compressors, or fittings
  • Bolt-on installation with basic hand tools, no drilling required
  • Laser-cut steel brackets with black powder-coated finish
  • Cushions road shocks and absorbs bumps for improved ride comfort
  • Works seamlessly when unloaded - maintains factory ride quality
  • Lifetime warranty on materials and workmanship

What's Included:

  • 2 Aeon hollow rubber springs (bump stops)
  • 2 Mounting brackets
  • 2 Rubber spacers (½")
  • Complete mounting hardware

Unlike air suspension systems, the Timbren SES requires zero maintenance after installation. The hollow rubber springs automatically compress more as weight increases, providing progressive support that keeps your vehicle level whether pulling a trailer or carrying heavy cargo in the bed. This system replaces the factory jounce stops on the frame, integrating seamlessly with your existing suspension. Installation typically takes under an hour with basic hand tools and requires no modifications to your vehicle.

Important: This system increases spring rate but does not increase your vehicle's GVWR (Gross Vehicle Weight Rating). Always ensure loads do not exceed the manufacturer's specified GVWR.

Products specifications

Grade Type

Performance

Prop 65 Yes/No

No

So far so good, price was great

So far, so good

Easy to use

site was pretty easy to use. we shall see how the products are. I noticed the photo of item ws incorrect but I searched by manufacturer part number so I know it will be correct. thanks

Very easy to order but wrong parts

I need tracking

It was quick and easy

cheap.

Part is for a Mustang and not for my 1961 Buick Special. Wrong part is bad business.

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