Vittoria lite inner tubethese lightweight tubes are perfect for racing where your bikes rolling inertia needs to be as low as possible the reduced weight will help you to accelerate and to maintain the speed you have reached although these tubes are lightweight they still have a high level of resistance to pinch flats and punctures features weight 100g 700x1823c presta 48mmbuyvittoria wheels tyresfrom chain reaction cycles the worlds largest online bike store