Only 30 grams of paint is used on bikes for the Tour de France. This correlates to merely one sixth of the weight of a coating of a normal bike which weighs around 180 g. A LONG JOURNEY The Tour de France has been held every July since 1903, with only a couple of intermissions during World War I and II. The tour, that is among the world's most prominent sports events, is regarded to be the hardest bicycle race