Challenge TE Tubular Limus TireThe Challenge Limus Team Edition is a premium tubular tire specifically engineered for the most demanding cyclocross conditions. Designed for pure, sticky mud and soft pack surfaces, it allows riders to maintain control and speed when traction is at a premium. Deep Knob Profile: Features aggressive, deep tread knobs that bite into thick mud while maintaining excellent self cleaning properties for consistent grip throughout a race. Corespun Cotton