Myth 3: Fenders Slow You Down

Off The Beaten Path

To celebrate 15 years of Bicycle Quarterly, we are looking at ‘12 Myths in Cycling’ – things that aren’t quite what we (and most other cyclists) used to believe. Part 3 of the series is about fenders.

Many cyclists here in Seattle install fenders when the rainy season starts, and remove them for the dry summer months. British time trialists even had quick-release fenders that they used on the ride to the start; then they took off the fenders for the actual competition. Our research indicates that this isn’t necessary – fenders don’t slow you down. Here is why:

Aerodynamics

Bicycle Quarterly did extensive wind tunnel research on the aerodynamics of real-world bicycles. Among things like riding position, clothing and bags, we tested the aerodynamics of fenders. We made a telescoping front fender, which allowed us to test various configurations. Here is what we found:

  • The portion of the…

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