Originally Posted by mscycler
Ill ask a question along the same lines. I noticed my bike chain rubs only on big/small or small/big. I am riding an Ultegra Double, and these are the only two combos that the chain rubs in. I have had my bike for about a month now, and my LBS said that I should bring it back in about a month or so and get everything dialed in after the initial riding period.
Sounds like it could be limit screws to me, making the derailleur not move quite far enough in either direction. If you're willing to give it a go adjusting it yourself, just step through the adjustment on the
Park Tool repair help - Front Derailleur adjustments page. Should be an easy fix.