When I am riding, when I shift to gears 7 or 8 my chain begins to rub on my front derailer cage. I am assuming that is not a good thing. I have been typically just been avoiding those gears as I live in a flat town where I'm not usually peddling that fast.
Anyway, I now have a decent set of tools and am ready to tackle this hopefully easy adjustment. Any helpful hints?
You probably have a simple case of cable stretch. Simply rotate the adjustment barrel on your front shifter 1/4 turn counter clockwise at a time until it goes away. You didn't mention what chainring you are in when this happens, so I'm going to assume 2 or 3. If its 1, then your cross chaining which you should then smack yourself and say "bad bike rider"
Mtnbiker172 has it right....make sure you're not cross-chaining. If you're not doing that, then it is a front derailleur adjustment that needs to be made.
There are a couple books availabe for bike maintenance, but I downloaded the PDF files from Shimano's website that detailed how to adjust my drivetrain and it worked well enough for me.
I just did a couple years ago and so happy I did. No longer required to pay the techs at the LBS to do simple tune ups. Once you get the initial adjustments set, you typically only have to adjust the barrel adjusters a couple times a season to re tension the cables. When your cable housings get too gummed up to provide crisp shifting action, they are easy to replace as well.
With a little practice, you will be a able to dial your ride in like a pro and it will perform like new.:thumbsup:
edit: I missed the post where he said he was in mid and large chainring.
If your derailleurs are out of adjustment, it could be any number of things, including cable stretch. You're likely rubbing on the outside of the chain guide (the side that is furthest from the frame), which would indicate too much slack in the cable. Increasing tension in the cable very slightly (the clearance on the chain guide is very small - you can look at the manual for your specific derailleur, if you have shimano, that's all online at their site) to give a bit more room. By adding tension, however, you may run the risk of sluggish shifting in to the small chain ring, especially when you have the chain under load (for example if you shift late), so be sure to test your shifting both by free pedaling it (on your bike stand or whatever you're doing while adjusting) and while riding the bike, preferrably up a grade of some kind.
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