Vittoria's time trial-specific Crono CS tubular tire is super light for maximum speed. This gram-shaver has been optimized to fit on wider profile road rims. It sports Vittoria's Isogrip compound for minimal rolling resistance and a sure-footed grip. Plus, Vittoria's 320-thread-per-inch Corespun T casing provides incomparable handling and cornering. And, at a mere 165 grams, this is one of the lightest tires around.