Because the constant almost maximum load on a motorhome (heavy body and travel equipment 3000-3500 kg) over time causes the springs to die and the rear to start to sag, here's some help for that.
Reinforced VB-CoilSpring springs ensure that the vehicle's original level is reached again, meaning the rear lifts and you get more spring travel.
In most cases, the frame is almost on top of the rubber damper, by increasing the remaining travel, the vehicle no longer bottoms out as quickly and becomes more comfortable.