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Join Date: Dec 2016
Location: Long Island, NY
Posts: 2,137
Bikes: Trek 800 x 2, Schwinn Heavy Duti, Schwinn Traveler, Schwinn Le Tour Luxe, Schwinn Continental, Cannondale M400 and Lambert, Schwinn Super Sport
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Jockey wheels are the usual maintenance item on derailleurs, however, since you are likely putting a lot of miles on the bike, I would pull the entire derailleur off the bike. Disassemble the jockey wheels, regrease (lightly) and clean the derailleur. I would use a "!Q-tip for this, or spray it with compressed air.