Fausto Coppi climbing the slopes of the Galibier during the 1952 Tour de France

The slopes of the Galiber are covered with snow as Fausto Coppi climbs to victory in the 1952 Tour de France.Note the spare wheels without any tires on them in the back of Alfredo Binda's Alfa-Romeo 1900M follow car. This was in the day when you could hand-up either a wheel, or a tire, but not both at the same time. The rider had to install his spare tubular tire on the new wheel, or take one off his old wheel. What were they using for glue back then that was tacky enough to use during a fast descent.