The vittoria lite presta inner tube features a presta valve and is engineered for light weight and puncture resistant features vittoria lite road inner tube 700 x 18 23mm presta 486080mm suitable for 18 23mm tyres durable lightweight construction built for road performance weighs just 110g manufacturer claimed three valve sizes available presta 48mm 60mm and 80mm ideal for racing and sportives inner tube etrto weight g valve lite 18 23 1