[vertr07]

Let's call it "cycling" instead.

[wdewind]

Why not biking?

[Someone]

Google "biker" and click on Images.

Although, to be fair, neither "biking" (Mountain bikes) nor "cycling" (racing bikes) shows appropriate images.

For appropriate images, you want "fietsen" or, better:

  site: bicycledutch.wordpress.com

[abrowne]

Then the people doing it are "bikers" ;-)