Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
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If you're riding with a Shimano indexing front derailleur, adjust the limits for effective shifting and optimum position in the gear combinations you expect to ride in, usually the mid to outer cassette cogs on the outer, and mid to inner cassette cogs on the inner.
The cage should be wide enough to accomodate most combinations without rubbing, but will rub on highly crossed combinations when the chain comes at an extreme angle. Not an issue, since crossed combinations are more inefficient and should be avoided.
If you're riding a system that allows the FD to be trimmed, (Campy, Sram) set the limits for good shifting and trim using the outer/outer & inner/inner combinations, then use the ability to trim to eliminate chain rub if and when it occurs.
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“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin
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WARNING, I'm from New York. Thin skinned people should maintain safe distance