The Continental quality road inner tube is a must have cycling essential for 700c bike wheels. Presta valve tubes are most commonly used for road wheels (700c) and on a few MTB wheels as the valves are thin. Continental's standard Race tube offers the best balance between rolling resistance and puncture prevention and masters the demands of everyday life effortlessly. The Wide version can be used on tyres between 25-622 and 32-630 (ETRTO). This high quality, lightweight butyl tube has a removeable valve core, perfect for race use. All tubes are seamless and mold-cured (vulcanized) to ensure uniform roundness and improved reliability at the valve stem. Each and every tube passes a stringent 100% quality control inspection.