Cheng Shin C1218 Street Tire, 26 x 2.125" Wire Bead All Blue. Cheng Shin C1218 Street Tire, 26 x 2.125" Wire Bead All Blue. Make Your Ride Stand out with These Colorful Tires ! Great Street/Urban tire for MTB, Fixies and Cruisers. Thick Heavy, Long Lasting Tread with Deep Siping Grooves Perfect for Commuting or Cruising ! ISO 559 / 26" ISO 53mm / 2.125" PSI 45-65