The Petlas Explero Ice W681 is a winter tire designed to handle extreme winter road conditions. The circumferential center tread has sharp angles that lead to the varied angle outer treads. This increases stability and traction during acceleration, cornering and braking. The wide grooves lead away from the center of the tire to move water and slush away from the contact patch to prevent hydroplaning. The tread blocks area set at various angles including hard 90 degree angles which provide biting edges for enhanced traction. The sipes on the outside shoulder treads bite on ice and snow for extra stability.