Panaracer GravelKing ZX Tire - 700 x 50, Tubeless, Folding, Black/BrownThe GravelKing ZX was designed for high speed performance on hard packed gravel, a slick center tread reduces rolling resistance, while the shoulder pattern is tuned to transition smoothly to provide consistent grip in cornering and descending. Each design element is developed to meet the demands of racing. Ideal for gravel, dirt, and rough pavement TuffTex boasts a supple, high thread count casing fortified with precisely engineered bead to bead