Trailers are increasingly equipped with air suspension. The shock absorber is a very important element. TRP shock absorbers are particularly qualitative because they have a 360 degree weld at the point where the shock absorber eyelet joins the trailer. They also have a Viton seal to effectively retain the hydraulic fluid. Note that TRP shocks absorbers contain high temperature hydraulic fluid so they do not heat up during operation. TRP shock absorbers are covered by a one-year national warranty.
