Castelli har inngått et nytt samarbeid med Tour de France. Saken tar for seg hva som kreves for å lage den gule ledertrøya.

Kilde: https://www.cyclingnews.com/cycling-kit-accessories/clothing-shoes/what-it-takes-to-make-the-yellow-jersey-inside-castellis-new-partnership-with-the-tour-de-france/