Schwalbe is the top-selling after-market tire brand in Europe, renowned for the consistent quality and tough as nails durability of their tires. The Marathon Racer is optimized for speed and low rolling resistance. It is the fastest Marathon tire ever, with Qualifier Compound casing and supple skin sidewalls. But like all Schwalbe Marathon tires, durability and puncture protection are high priorities and the Racer is equipped with two ply's of anti-puncture RaceGuard embedded in the casing. 3M reflective tape on the sidewall adds an added measure of safety. We've selected a larger volume 1.5" width version for the optimal blend of speed and comfort. Upgraded for 2008 with a more supple sidewall for lower rolling resistance and a 40g reduction in weight.