High quality inner tubes suitable for all makes of tyres. The ultimate ultra light butyl tube. Available in sizes 700c and 650c in both short and long Presta valves. - Super lightweight tube to match the Supersonic tyre range - Presta valve - All tubes have a seamless construction, with a mould-cured vulcanisation, to ensure uniform roundness - Weighs only 50g Size: 700x18/25mm Valve length: 36mm