Are you new to driving a 30-foot class C motorhome? If so, you may need to get used to the feeling of being jerked around by the vacuum of passing big rigs and blasts from crosswinds. You will gradually develop reflexes and become more relaxed driving your rig. It helps to stop at rest stops etc., every so often to recover from the harsh ride, steering effort and road noise Front end alignment with rig loaded, adjustment of tire pressures and minor to major suspension modifications may improve the feel of steering and handling on the highway, but, a Class C is a big flat- sided vehicle with stiff springs, at the mercy of crosswinds and vacuum of passing big rigs. After spending thousands on suspension and steering aids, some claim that thier rig rides like an SUV.