Which year was the longest ever Tour de France route ridden?

Explanation

In 1926, the 20th edition of Tour de France took place. The route was made up of 17 stages, altogether coverig 5745 km. This is the longest course ever in Tour de France history. The competition was won by the Belgian Lucien Buysse, who rode with an average speed of 24.064 km/h and an overall time of 238 hours and 44 minutes. The stages were 332 km long on average.