Lifeline lightweight road inner tubes are designed for 700c rims and are available in two valve lengths trim weight and ride safe in the knowledge that lifeline inner tubes are made of high quality butyl rubber and are air leakage tested sizes available 700 x 1825c etrto 1825 622 weightsall weights 10 700 x 1825c 48mm 835g 700 x 1825c 60mm 845g