Yokohama Tire’s RL42T and RB42T off-the-road tires are designed for dump trucks, but have two different applications. The RL42 is for hard-packed surfaces and jobsites where longer hauls are needed. This tire has circumferential grooves that dissipate heat to run cooler, a directional tread pattern that improves self-cleaning for increased traction, and deep, wide grooves that help expel mud and dirt for better traction. The RB42 features a zig-zag groove pattern that provides better traction on muddy and rocky surfaces and large center blocks that increase resistance to cuts and enhance overall wear. Both tires comes in sizes 1800R33 and 2400R35.