York, who competed when known as Robert Millar, is one of Britain's most successful cyclists. York won the "King of the Mountains" competition in the 1984 Tour de France and finished fourth overall. This success was the first time a British rider won a major Tour classification, and was unsurpassed as the highest Tour finish for a Briton for over 20 years until Bradley Wiggins was retrospectively placed third in the 2009 Tour de France. York rode the Tour de France eleven times, completing the race eight times.