Falken ZIEX S/TZ04 All-Season Tire - 255/55R18 109H Solid center rib for improved lateral handling and highway stability Four wide circumferential grooves deliver increased hydroplane resistance for improved wet weather performance High angle lateral grooves with offset block position maximizes water dispersion and all season traction Heavy, full depth siping for excellent wet traction, delivers unparalleled levels of all season grip throughout the life of the tire 2 into 3 block pattern ensures low noise and flat, even wear for the highest levels of cabin comfort