Engineered to provide outstanding performance for professional riders in the World FIM Motocross, the AMA Motocross and Supercross championships and enthusiastic riders of all capabilities. Tread pattern born to offer the best performances on mid-hard surfaces with an excellent traction even on increasingly severe terrain conditions during the race. A totally new rear tread pattern advances the Mid Hard 454's performances; each block contributing to an improved traction and power transmission. Optimal resiliency for consistent performance over time. Dedicated compound for outstanding grip in lateral sliding control. Block links (or "bridges") layout for tear resistance. Tread pattern and compounds proven with the most prestigious competitors in MX World Championship. Tire Specifications: Load / Speed index: 51M. Construction: Bias.