Joined: Jan 2009
Posts: 44,123
Likes: 6,340
From: New York, NY, and High Falls, NY, USA
Bikes: 1962 Rudge Sports, 1971 Raleigh Super Course, 1971 Raleigh Pro Track, 1974 Raleigh International, 1975 Viscount Fixie, 1982 McLean, 1996 Lemond (Ti), 2002 Burley Zydeco tandem
Good questions, and I don't have answers. But once takingcontrol lubricates the chain, freewheel, and pulleys, he will know if the drivetrain has adequately low friction. My guess is that worn teeth don't matter on derailleur pulleys.
But one thing makes me scratch my head: how do you wear out teeth on derailleur pulleys?