These shock absorbers have been on my minivan for about 5 years now and I am very happy with the results. They don't leak, it's not difficult to drive as you would expect from an air cushion and they helped me when I had to carry a heavy load of wood. The kids have grown up and now I use my minivan like a truck with the seats removed. I bought them to withstand heavy loads when I pump them up and then lower them back down. Moved wood, clapboards on my house, pavers for pathways, whatever.