FRM2A- Rear Axle SES Suspension Upgrade

FRM2A - Rear Axle SES Suspension Upgrade

This SES Suspension Upgrade can be adapted to fit the rear suspension of most heavy-duty Freightliner M2 series & Columbia trucks as well as Sterling Trucks L85 & Western Star 4900 trucks equipped with AIR springs. Each laser cut piece of steel is precision bent and powder-coated to ensure a quality fit. We’ve engineered our hollow rubber springs to deliver a progressive spring rate. In other words, the more weight that pushes down on the rubber springs the harder they work to prevent rear end sag, and help stabilize the load.

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Product Features

  • Eliminate Vehicle Squatting & Sagging
  • Cushion Road Shocks
  • Improve Handling
  • Satisfaction Guarantee
  • Lifetime Warranty

Customer Reviews


"The Timbren system is the answer for rear end sag and soft handling! My 35ft 5th wheel handles much better, and I recommend Timbren without reservation."

- Larry V. - SD

“Timbren's work amazing! Absolutely as good or even better than air bags! Did it myself and only had time to drink 2 beer doing it! Easy install. Thanks for the advice. Simple yet very effective.”

Jonny K - NB

Fitment Checklist


Freightliner Columbia
2011-2015
Equipped With Air Spring Rear
Freightliner M2 106
2002-2015
Equipped With Air Spring Rear
Freightliner M2 106V
2002-2015
Equipped With Vocational Air Spring Rear
Freightliner M2 112
2002-2015
Equipped With Air Spring Rear
Freightliner M2 112V
2002-2015
Equipped With Vocational Air Spring Rear
Sterling Truck L85
1996-2007
Equipped With Air Spring Rear
Western Star 4900
2000-2015
Equipped With Twin-Steer Air Spring

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