M5B EVO. Motocross M5B EVO for Mud / Sand / Soft Terrain. M5B rear tires are the ideal set-up for riding in the mud or through soft sand. Their self-cleaning treads help keep you going in the most severe conditions. The outstanding traction of the M5B also makes it a great tire for hill climbs. IRC's iconic M5BEVO now comes with matching front tire to meet market's expectation. Designed and tested in soft loamy situation to bring the perfect balance with the giant knob M5BEVO rear tire. Block Pattern: Optimized block spacing to enhance self-cleaning performance simultaneously provide bite through soft loamy situation. Taper angle has adjusted to enhance handling performance. All-New Compound: Updated new rubber compound increased breaking grip with excellent durability. Tire Specifications: Type: TT. L.I.: 58M.