Pumpkin Ridge 650B x 42Description The ultimate dual purpose tire offers excellent performance and cornering on paved roads, yet its large knobs dig into the surface when it gets slippery. Rene Herse distributed the knobs so that the tire always is supported by the same amount of rubber, whether its rolling forward or leaning into a turn. This gives you uniform grip at all times whether on a muddy cyclocross course or during a paved descent with ultra fast hairpin turns.