Designing & Manufacturing Premium Suspension Products since 1965. Timbren designs & manufactures Suspension Enhancement Syste ... ms for Trucks, Vans, and SUV's. Our kits remove vehicle sag & sway under heavy loads. Whether you are hauling a trailer, a load of dirt or pushing a snow plow Timbren is the solution for suspension problems. Timbren also designs & manufactures a complete line of Trailer Suspensions. Our Axle-Less & Silent Ride trailer suspensions utilize rubber spring technology. Our Axle-Less suspension won an award in 2011 at SEMA (Specialty Equipment Market Association) for Best Off-Road Product of the Year. Timbren also has 2 air suspensions - the Dakota Air and STi air suspension. We love suspensions. read more