Challenge Strada Bianca H-TLR Pro Series 700x45 TanRace it hard or just head off the beaten path. The Strada Bianca takes the proven construction of the Paris Roubaix and adds volume to take you comfortably over less than perfect surfaces. Challenge introduces STRADA BIANCA H TLR 45. The staple herringbone design tire proves its handmade performances on rougher terrain with a new gravel specific construction and an added, beefier new 45mm size. The STRADA BIANCA 45 is the tire designed to take you