Upload & Sell: Off
With the tour de france due to start in 12 days, I figured I had to enter a bike photo in this weeks assignment. I have heard that the tour de france is one of the most challenging human endurance sports events, with the participants expending over 34,000 kcal over the 9 days of riding. All on a human invention that has its roots going back to the wheel (~2000 BC) and the chain (~225 BC).
Thanks for looking.