Michelin a1 aircomp ultralight road bike tubeweight is every racers enemy a few grams can mean the difference between winning and losing now professionals and amateurs alike can have the advantage of our remarkably light service course tubes which weigh barely 70 grams in the a1 road version its extremely light weight and michelin quality are a formidable combination featureslightweight michelin qualityweight 70gbuymichelin wheels tyresfrom chain reaction cycles the worlds larges