Schwalbe Marathon Plus Tire - 26 x 1.75 Clincher Wire BLK/Reflective Performance LineSchwalbe Marathon Plus Tire 26 x 1. 75 Clincher Wire Black Reflective Performance Line. The Schwalbe Marathon Tires incorporate light reflecting sidewalls for better visibility and also utilizes a Silica compound for easy rolling and longer life. SmartGuard puncture protection to resist thorns shards and even thumbtacks Marathon Silica compound for easy rolling and longer life Reflex sidewalls incorporate light reflecting bands TECH SPECS Color Black