Summary: Once upon a time, no British cyclist had ever won the Tour de France. Over 100 years of trying, and, precisely, zero wins. Then a guy named Sir David Brailsford stepped in and created Team Sky. He said that a British cyclist would win the Tour within five years. People thought he was crazy. Until they won it in two years. Then, for good measure, they won four of the next five races as well. How’d he do it? Marginal gains.
