I installed the Sumo Springs on my 2018 Thor Siesta 24SS which is built on a 2017 Mercedes Benz Sprinter 3500 chassis. They are easy to install as long as you are able to raise each wheel (one at a time) to gain additional space to remove the old factory bump stops. They make a huge difference in the side to side swaying motion going into/out of driveways and on the road when being passed or passing large trucks.
Paul
__________________
|