Why was Remco Evenepoel running inner tubes during the Olympic road race - where he punctured in the closing kilometres?

Remco Evenepoel.

It's been a rather resplendent week for Remco Evenepoel, claiming two gold medals on the road: first in the Olympic Time Trial and then in the Olympic Road Race.

However, the latter title very nearly came unstuck when the Belgian superstar suffered a puncture inside the last 10 kilometres of the race, with a little over a minute of time to play with.