Continental race 28 light tube high quality butyl tube ideally suited for racing this light version is thinner than the standard race 28 tube so keeping them inflated to the correct pressure will help prevent the risk of pinch flats unsurprisingly it also saves you rotational weight helping to increase your speed that little bit extra specifications etrtosizeweight18 622 25 630 27x34 1 700x20c 25c 82g buy continental wheels tyres from chain reaction cycles the worlds largest onlin