quick release skewer

Noun

 * 1) A mechanism for attaching a wheel to a bicycle, consisting of a rod threaded on one end and with a lever-operated cam assembly on the other. The rod is inserted into the hollow axle of the wheel, a special nut is threaded on, and the lever is closed to tighten the cam and secure the wheel to the fork.

Translations

 * Finnish: pikalinkku
 * German: Schnellspanner