Continental Tour 28 inner tubes are high quality without the price tag. Made from Butyl rubber, the Tour 28 tubes are ideally suited for commuting, trekking and touring bikes. All cycling tubes have a seamless construction with a mould-cured vulcanisation for consistent roundness. These Continental inner tubes make excellent backup options to slip out of a saddle bag when you need them. Key Features: Touring tube made of ButylFits 28 - 47 mm sectionsPresta & Schrader valve optionsAll tubes have a seamless construction, with a mould-cured vulcanisation, to ensure uniform roundness