Pawl

Sheldon Brown's Bicycle Glossary · letter P-Q
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A spring-loaded part that engages a set of teeth when moving in one direction, but slides over them when moving in the other direction. The pawls in a freewheel make a ticking sound when a bicycle coasts. Most freewheels have two or three pawls.

Copyright © 1996, 2008 Sheldon Brown

Original: https://www.sheldonbrown.com/gloss_p.html#pawl · Reproduced on en.wikipedalia.com with permission, all rights reserved.