We have used the Michelin M/S2 tires on three RVs and on a 2003 F-150. The RVs were a 2008 Winnebago E350 chassis and two 2003 Sportsmobile E350 vans. All of the RVs had a noticeable improvement in handling and no sway because of the stiffer side walls. The Winnebago had Michelin M/S tires on it before the M/S2 tires and those tires did not have stiff sidewalls and wandered all over the road. We still have the two Sportsmobiles and feel very secure driving on wet or dry pavement. We looked at the M/S2 data on tirerack.com to help make our decision.