CST - Cheng Shin Tire C-740 Road tire Wire Bead 700 x 25 All Blue. CST - Cheng Shin Tire C-740 Road tire Wire Bead 700 x 25 All Blue. Great Valve Road Tire ! Tough & Long Tread Life ! Grooved Tread with Directional Siping for Wet Conditions. Weighs only 400g.s 100 PSI 27 TPI