Because most modern sport bikes are designed as replicas of racing motorcycles and are not intended for long distance comfort, Zero Gravity has introduced its Sport Touring" Series of sport bike windscreens designed to reduce the windblast on the rider and provide more comfort while in the upright riding position. Because no two humans are alike, it is difficult if not impossible to predict precisely how these screens will perform or raise the point at which the wind will hit the rider by several inches and will significantly reduce the windblast on the rider. Buffeting and other aerodynamic considerations will vary according to the riders' physical dimensions.