Davide Rebellin, a cyclist from Italy, died after colliding with a truck while training.
He was the first rider to win the three Classics in a single season.
He retired earlier this year.
He won an individual stage in the Giro d'italia.
The chief of the Tour de France said this was a sad day for cyclists.
John Lelangue said he couldn't believe it. He was with us at the dinner party.
He was a lovely, loyal person and we shared some wonderful moments together.
After winning a silver medal in the men's road race at the Beijing Olympics, Rebellin was ordered to return it because he tested positive for a banned substance.
He was banned for two years after testing positive for a blood-booster.
His family remembers him as a person who lived to ride his bike.