Product details:

These tires make an optimal choice for professional training to amateur to semi-pro racers who ride all types of terrain, and demand performance lap after lap, especially under "race simulation." The Scorpion MX Extra X tires feature a multi-ply carcass with high resistance to punctures, but maximum flexibility to absorb forces during jumps or obstacles. If you're serious about tire performance, give these tires a go--they're purpose-built for racing!