Groove Lifts In varying, versatile SUV use, it is especially important to have the tire behave in a controlled and logical manner while driving. This is helped by the Groove Lifts on the tread blocks adjacent to the centre rib of the symmetrical tread model and the longitudinal ribs. This additional support combines the best features of the longitudinally ribbed and arrow-patterned winter tires. The Groove Lifts also make the tire behave in an extremely stable and controlled manner on dry roads. The Groove Lifts also prevent small rocks from becoming wedged in the grooves.