The Air Trak is designed for ultimate XC speed on hardpack terrain. 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 for XC racing. All You Need to Know About The Fastest XC Tires The Fastest The fastest-rolling tread, plus T5/T7 dual compound, plus Flex Lite casing combine for unmatched XC speed. 60g Lighter Optimized tread and Flex Lite casing deliver extreme lightness at just 575g. Flat Resistant Light doesn't mean fragile with durable and cut-resistant casing. Grid Lite Casing Our fastest, most robust XC casing with added puncture protection and stability. 50% More Force to Flat Our Control wheels and Air Trak tires are engineered as a seamless duo, requiring 50% more force to pinch flat than the previous generation. Proven by multiple World Cup victories, the Control wheels and Air Trak tires deliver unmatched speed and strength so you can focus on winning races instead of fixing flats. Made in Racing "Air Trak is the fastest and lightest tire I've ever ridden and is perfect for races. It rolls fast off the line, through turns, and rock gardens and the casing options practically eliminate flats" -Victor Koretzky, Specialized Factory Racing