The Ecsta MX XRP molds an advanced silica tread rubber compound into adirectional tread pattern that features massive, stable blocks toincrease cornering traction and steering response, while four largecircumferential and multiple directionally aligned lateral groovesresist hydroplaning and enhance wet traction. Internally, the two widesteel belts are reinforced by spirally wound nylon cap plies to provideexcellent strength, uniform ride quality and Y-speed rated capabilitywhile the sidewalls are tuned to resist lateral deflection and toprovide handling control and feedback. Rubber run-flat inserts aremolded on the inside of both of the tire's sidewalls to providetemporary continuing mobility in the event of a puncture causingcomplete loss of air pressure.