When Chris Froome is racing, he imagines he has a bag of coins to spend. Every time he wastes energy, he needs to pay. He pays whenever he's pedalling against the wind.

Chris Froome's descent of the Col de Peyresourde on stage 8 of the 2016 Tour de France, where he was tucked precariously low and forward on his top tube, pedaling like mad, was so unusual, awkward, and effective that it sparked a mixture of revulsion and Sunday club-run copy cats.

The bicycle chain. Most won’t give it a second thought when it comes time for a new one, and it’s common to simply replace the worn chain with one that matches the name on the derailleurs. Perhaps a rare few will try something else in the pursuit of improved corrosion resistance, better shifting, lighter weight, or a few dollars saved.