Sportmax Roadsmart IV TireThe all-new Roadsmart IV delivers best-in-class handling, grip and mileage. Featuring a completely new tread pattern, construction, compounds, profiles and new technologyCompared to the Roadsmart III, the RSIV increases mileage by 23 percent in the front and 26 percent in the rearNew tread patterns, construction, compounds, and profiles increase ride comfort, grip and mileageNew technology allows the RSIV to maintain its high-performance throughout its lifespanMT Multi-Tread™ technology in the rear tire uses a long-wearing compound in the center, and special lateral compounds on the shoulders for outstanding gripNew sidewall construction improves wet and dry handling and comfort