The p knuckle of the rear derailleur is a small part that regulates the tension of the chain running over the derailleur. This video features a professional bike mechanic installing the p knuckle into a rear derailleur during an overhaul of the derailleur. This is an important piece of maintenance even for new equipment, so take note!
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Mountain Biking How to Install a P knuckle while overhauling a derailleur
By WonderHowTo
Jun 8, 2010 04:45 PM
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