" The premium latex inner tube for cyclists who require the best performances in race. Latex tubes are light, subtle and they generate low friction between the tyre. All these characteristics work together in reducing rolling resistance. Available with Presta valve in all common sizes Latex tube Extremely light and subtle The best choice for racing performances Features: Material : Latex Valve : Presta Core : RVC 48mm Size : 26 Width : 1.70/2.30 Weight : 135g "