[Nitto NT 555RII competition tires] - The Nitto NT-555RII Extreme R road race and auto cross competition radial tire was developed through a unique fusion between a race circuit oriented stiff sidewall construction and the popular Nitto Drag Radial tread pattern. These features combined with the high traction, specially formulated soft racing tread compound resulted in a competition radial that exhibits impressive control and handling, to provide maximum traction under severe racing conditions. The Nitto NT-555RII is designed primarily for competition road racing. The sidewall construction is optimized for handling extreme lateral acceleration; vehicles may experience rougher riding when used for daily driving.
Always replace valve stems with your new tires … that's added insurance against slow leaks that can result in unsafe driving as well as uneven and premature tire wear.