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Timbren Industries FRTT350F Rear Severe Service 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

FRTT350F
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 Industries FRTT350F Suspension Enhancement System is a severe service rear suspension upgrade designed specifically for Ford F-250 and F-350 Super Duty trucks. This kit uses single-convoluted Aeon rubber springs designed exclusively for truck campers and top-heavy loads, resisting weight more aggressively to keep your vehicle level and your ride smooth.

Key Features:

  • 8,000 lb weight capacity rating
  • Laser cut steel brackets precision bent and powder-coated for quality fit
  • Progressive spring rate Aeon rubber springs that push back harder as load increases, eliminating squat, sway, and roll
  • Zero post-installation maintenance - no air lines to run, no pressure to check, no leaks to watch for
  • Can be installed and hauling in under 30 minutes from your driveway
  • Simple bolt-on installation with included application-specific brackets and comprehensive instructions
  • Maintains 1/2" to 1-1/2" gap between rubber spring and vehicle frame for comfortable unloaded ride
  • Backed by lifetime warranty covering defects in material and workmanship

Ideal Applications:

This severe service kit is specifically designed for hauling top-heavy loads like truck campers or salt spreaders that require maximum stability. The Aeon hollow rubber springs absorb road shock and automatically adjust to uneven loads or road conditions, improving ride comfort and reducing the risk of bottoming out.

What's Included:

  • 2 mounting brackets
  • 2 patented Aeon SES hollow rubber springs
  • All necessary hardware

Important Note: Even though you're increasing the spring rate by adding this upgrade, this does not increase the GVWR (Gross Vehicle Weight Rating). Please make sure that the load does not exceed the GVWR set by the manufacturer.

Products specifications

Grade Type

Performance

Prop 65 Yes/No

No

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not a lot of detail, but so far so good.

Good so far

Best price around and perfect for my trailer restoration!

easy to use thanks cheaper than RockAuto

Awesum

I'm hoping this product fits my truck. Nothing in the product description. I'm relying on Google right now.

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