Film poster from the time
Totò al Giro d’ Italia is an Italian comedy released in 1948 when cycling was very popular. A Faustian bargain is made with a professor who will marry a beauty contest winner, only if he wins the Giro. At one point in the film, the racers wonder how they professor is doing so well, what was his secret, and having seen him smoking a cigar, at the start of the next stage they all began to smoke.
In the scene ,legends Coppi and Bartali puff on huge Tuscan cigars.
Coppi smoking a huge cigar
Read a review of the movie in Italian and see a clip on YouTube.