- Designed to provide comfort in driving and elegant style, the Optimo H426 employs 5-pitch design to optimize lateral grooves to drastically reduce noise. - Rounded main groove edge minimize noise arising from the vibration of block edges - The Optimo H426's symmetrical tread pattern offers a smooth comfortable ride throughout the life of the tire. - Rounded main groove edge minimize noise arising from the vibration of block edges - The Optimo H426 uses an advanced tread silica compound that improves both wet braking and fuel economy.