I understand that if you are in a gear that is cross-chaining, you can expect some amount of rubbing. However, when I'm in the middle chain-ring, the chain seems to be rubbing on the inside of the front derailleur on the largest 2-3 cogs (on an 8-speed cassette). This isn't normal is it? I don't know much about bicycle maintenance beyond a simple flat-repair and basic cleaning/lubing, so if you guys have any suggestions (worded for a complete newbie to this), I'd greatly appreciate it. Beyond being annoying (since I'm in the middle ring and largest 5 or so cogs most of the time - it's pretty flat where I ride), I can't imagine it's very good for the chain or derailleur.
Let me know if more information is needed. Thanks in advance.