Tour de France: Too Fast to Be Clean?(statista.com)
statista.com
Tour de France: Too Fast to Be Clean?
https://www.statista.com/chart/22981/average-speed-of-tour-de-france-winners-by-decade/
https://www.statista.com/chart/22981/average-speed-of-tour-de-france-winners-by-decade/
What about improvements in technology, what about different routes and distance each year, improvements in training, number of time trial or mountain stages, maybe there is more riding as a peloton in recent tours, resulting in higher averages?