Pair of Tires Bell -(made by Cheng Shin) 18" x 1.95" all White Dirt-X (Smoke Pattern) Wire bead. Pair of Tires Bell -(made by Cheng Shin) 18" x 1.95" all White Dirt-X (Smoke Pattern) Wire bead. This is a PAIR of Tires !! Designed for smooth trails, bike paths, and street use. Works as well on dirt as it does on pavement ! Smoke Traed Pattern - Dirt-X ISO Diameter: 355 ISO Width: 50 mm PSI: 30 - 40 PSI 60 TPI