Hankook Optimo H426 3/4 Groove Radial Tire - 245/45R18 96V 60,000 Mileage Warranty The perfect balance between performance and comfort The use of an advanced silica tread compound offers improved All-Season performance. Better treadwear and lower rolling resistance for better fuel economy. The Optimo H426 is where All-Season Touring, Luxury and Performance meet.