VeloChampion 2 or 3 x Butyl Road Bike Inner Tubes - 700x18/25C Presta 40mm, 60mm or 80mm Valve Length High quality 100% butyl inner tube with presta valves (High Pressure Valve or French Valve) in 3 length sizes. Choose to buy in bulk and save s! 700x18/25C inner tubes can be found on road bikes, triathlon bikes and some slim tyres for commuting/touring bikes Threaded valve stem with security ring prevents rattling on the rim and makes pump attachment easier Reinforced dual thickness tube/valve interface to prevent punctures Light weight butyl rubber construction. Weight: 110g (approx). CE standard.