Smaller Gears, Slower Riders? Tour de France Gears Explained | Tour de France 2017
Simon takes a look around the Katusha Alpecin mechanics truck to see how cassettes/rear derailleurs have revolutionised to the needs of cyclists. Subscribe to GCN: http://gcn.eu/SubscribeToGCN Get exclusive GCN gear in the GCN shop! http://gcn.eu/hJ
