Challenge Tire Strada Bianca Pro TLR Tire 700 x 40 Black/TanThe Strada Bianca takes the proven construction of the Paris Roubaix and adds volume to take you comfortably over less than perfect surfaces This is your tire for rough roads, packed dirt, and most gravel surfaces This clincher with 120TPI nylon casing provides both performance and durability. This TLR clincher with 120TPI nylon casing provides both performance, durability, and puncture protection when combined with the appropriate tubeless sealant.