The K591 is the approved Harley-Davidson sport tyre.DunlopâEUsÃ,,ôs K591 features a directional tread pattern and improved tread compounds to deliver wet and dry grip corning performance.Harley Davidson OE TyresMade in USA.Originally designed for racing but now incorporating refinements to meet the demands of sport and sport touring riders, the K591 is approved by Harley-Davidson for its sport models and carries a V speed rating.The K591 delivers optimum grip in wet or dry weather for confident cornering.