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 554 performances; each knob contributing to an improved traction and power transmission. Optimal resiliency for consistent performance over time; Dedicated compound for outstanding grip in lateral sliding control; Knob links (or bridges) layout for tear resistance. Tread pattern and compounds proven with the most prestigious competitors in MX World Championship