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Old 09-06-08, 10:12 AM   #1
firequall
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Rear derailleur adjustment help

I'll preface this with saying that I'm relatively new to bike repair but I'll try my best to explain things.

Right now I'm trying to adjust my rear derailleur. A few weeks ago my bike took a bit of a fall but I'm pretty sure that I bent the part that hangs lower and keeps the tension. I don't think it's that bad as it hasn't dug into the spokes yet but shifting gears has be interesting ever since. I've got it mostly fine tuned but the problem still exists of the derailleur completely skipping a gear when I shift. Right now it seems to completely skip over the third (of six) but anything within the third to fifth range is pretty shady. I've adjusted the limit stops to stop the hanger from rubbing up against the spokes as best I could (so far it has stopped) and tightened the adjustment barrel to make the shifts a little bit smoother. Regardless of what I do it always seems to skip over this gear.

Any ideas on what could be causing this and/or how to fix it? I'd much rather not have not have to take it into a shop since I don't have much money to spend right now (starving college student, etc).
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Old 09-06-08, 11:35 AM   #2
antokelly
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firequall i had the same problem ,ok make sure all the cable housing are sitting ok in the stops make sure the cable is not slack in any or all gears ,.if you look up utube theres loads of video help on there .
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Old 09-06-08, 04:43 PM   #3
wmodavis
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First order of business to get shifting back in order is to check or have your derailer hanger checked and adjusted. The point where the derailer mounts should be in the same plane as the rim of the wheel. To verify if it is or isn't requires that the wheel be laterally true and properly mounted. Once the hanger is adjusted then you can begin RD adjustments. If the hanger is off plane with the rim then all RD shifting adjustments will be nearly impossible to tweek for flawless shifting performance. If you can't check hanger adjustment (requires tool similar to Park DAG-1) have your LBS check and adjust it. It is possible the hanger was just bent a bit or it may be worse and need to be replaced. Don't chance riding without the hanger being in good condition and adjusted as you will risk having the derailer go into the spokes and needing a new wheel and RD. That's not a good alternative and a bad risk.
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