For ultimate XC speed on hardpack, Air Trak delivers. Its fast-rolling tread cluster and high-speed center T5 compound ensure unmatched straight-line velocity, while grippier T7 compound on the sides delivers traction to maintain cornering speed. When sheer speed matters, Air Trak is the perfect choice. Features: Casing - 60TPI Grid Lite with sidewall protection.Compounds - GRIPTON T5/T7.Terrain - Mountain - Hardpack. Type - Tubeless.Use - XC racing.Wheel Pairing Recommendation - Roval Control World Cup and Roval Control SL.