aka Tom Reingold
Join Date: Jan 2009
Location: New York, NY, and High Falls, NY, USA
Posts: 40,503
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
Mentioned: 511 Post(s)
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Quoted: 7348 Post(s)
indexed front derailleurs
I'm back into fixing bikes after a many-year hiatus.
One thing I still don't get is indexed front derailleurs. Chain angle changes when you shift in the rear, and you need to tweak the front derailleur. But you can't. Huh?
Also, to get the front derailleur right for one chainring, it's wrong for one or two other chainrings. On my new bike (which I just built with Ultegra 9-speed stuff), the chain rubs the front derailleur on the left side when it's on the smallest (of three) chainring. If I adjust to eliminate that, then it will rub on the outside when it's on the largest chainring. In other words, the distances between the chainrings need tweaking, but I don't believe it's possible.
Please help.
Thanks.