Schwalbe CX Pro Tire for Cyclocross. Lightweight cyclocross tire with aggressive yet well spaced knob structure. Heart shaped center knobs surrounded by sharp raindrop knobs love the mud. Great for front and rear as well as climbing and descending. Schwalbe's Offroad Racing Compound (OCR) hooks up well while maintaining durability. I bought this about 2 years ago, but never used it. It's in new condition. Features : Incorporates Evo-Carcass, special tread arrangement, U-Blocks and PaceStar Triple Compound Designed for optimal grip and high speed; 67 tpi (threads per inch) Wire bead 50 EPI casing. 45-80 PSI 700C x 30mm (ISO 30-622) ca. 430 grams