A chain whip is a specialized bicycle tool used to remove or secure cassettes (cogs) on the rear wheel. It's essential when removing a cassette—for example, to clean it, replace it, or service the rear wheel.
Handle: Usually made of metal or covered with rubber to provide a good grip.
Short piece of bicycle chain: This is attached to the handlebar and engages with the sprockets of the cassette – hence the name “whip” because the chain is loose and flexible.
When removing a cassette you usually need two tools:
Cassette key (also: puller): Is inserted into the locking ring of the cassette.
Chain whip: Holds the cassette in position so that it does not rotate when the lockring is loosened.
Remove the rear wheel.
Place the chain whip on one of the larger sprockets so that it braces against the direction of rotation when loosening.
Use the cassette key to loosen the locking ring counterclockwise.
Remove cassette.
The chain whip is a simple yet effective tool that is essential for bicycle maintenance—especially in the drivetrain area. It's especially relevant for road bikes, mountain bikes, and gravel bikes with cassette drivetrains.
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