The Roadmaster RM180 is a long haul steer tire that is SmartWay verified. The modern tread pattern, shoulder decoupling groove is designed for long wear life and to prevent irregular wear. The casing construction and the way the belts are aligned also contribute to long tread-life. This attention to detail leads to an optimized footprint shape which is very key to long wear. The tire also features micro-sipes on the groove edges for the added grip and traction needed on in the rain or slick highway conditions.