I had the firestone airlifts on the rear and I kept it at 90lbs air pressure. It helped the coach from dragging on dips, but as far as wind goes or trucks on two lane roads, you are still going to get that buffing. The reason is because a gasoline motorhome is thousands of pounds lighter then a heavy diesel coach. I used to love my gasoline coach on everything but the bouncing around with cross winds and buffing on incoming big rigs. So I got rid of it right away. Mine was 36' F-53 chassis.