To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
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When hauling a heavy load or towing a trailer, the rear end can sag and throw off your handling. The Timbren Rear Suspension Enhancement System adds up to 6,000 lbs of extra support on the rear axle to keep your truck level and steady. The hollow rubber springs mount above the axle and stiffen progressively as more weight is added, helping to eliminate squat and keep braking, traction, and steering under control.
Rough pavement and bumps can beat up your factory suspension. These Aeon hollow rubber springs work like heavy-duty shock absorbers, taking the brunt of every bump to smooth out the ride. The rubber design soaks up road shock and vibration, keeping the truck comfortable when loaded and cutting down on wear to the stock suspension by preventing bottoming out on rough terrain.
When you swerve or hit uneven terrain, each Timbren spring works independently to support its side of the vehicle. This helps control body roll and keeps the truck stable through corners, wind gusts, or when carrying off-center loads. The result is a planted feel on the highway and less sway transferred to a trailer behind you.
Adding rear support doesn’t have to be complicated. The Timbren system includes custom brackets, hardware, and two Aeon rubber springs that bolt directly in place of the factory bump stops with no drilling required. There are no airlines, compressors, or manual adjustments to deal with—just a simple bolt-on setup that’s ready for real work once installed.
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
Ratings & Reviews
Chris
4/6/2026
Still very pleased with this product.
Joe J.
4/4/2019
Great
Clarence B.
11/18/2017
Working as good today as the day I installed
Kirtland J.
8/7/2015
A year and 10,000 miles later, still going strong!
Randy
2/9/2019
Helped out on load a great deal! Under a load the truck is much more solid ride.
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Brooke M.
1/13/2025
Hey Jeffery! It is not a must - it is a spacer and if you dont need it, you don't have to install it. You want an unloaded truck or van to have a half inch to inch and a half gap. Its just there to bridge the gap if there were too much space between the Timbren and the spring. But if all is well without it, that is just fine and dandy!