Riding regularly in a group will increase pad wear, says Jon. The additional braking required to maintain a distance to the rider in front, and the concertina effect that causes heavier braking for riders in the middle of a pack responding suddenly to the deceleration of the riders at the front, are two causes.

Another thought provoking issue: a worn rim will one day collapse. The consequences can be catastrophic. As the rim becomes thinner and thinner, it will start to bow outwards beneath the pressure of the tyre. When the rim is no longer strong enough to bear the pressure of the tyre, it will crack, and large sections will peel off.

“It’s extreme, but it happens,” says Jon. “It happened to a guy I was riding with recently – luckily on a flat piece of road.”

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