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Old 03-30-09, 03:02 PM   #1
JHCO
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Not sure whats wrong please help

Long time prowler, first time poster. Hereís the problem. I have a 2009 Gary fisher piranha and don't have much knowledge about bike mechanics. Today I wiped out know big deal just underestimated a street curb, got a little road rash and a few light scuffs on the bike otherwise the bike looks fine, however, when I put it in a gear that uses the #8 gear (the second smallest one on the rear of the bike) it will skip/the chain jumps every couple of turns of the pedal. I looked at the gear and it seems to be normal (no broken teeth and its not bent). Like I said I donít have a lot of bike mechanical know how. Any suggestions on what might be wrong?
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Old 03-30-09, 03:05 PM   #2
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Does it also skip on the highest gear (#9)? It sounds like you have a pinched chain. The link has sufficient mobility to to travel normally around the lower gears but as the cogs get smaller the chain can no longer bend sufficiently and causes the skip. Best bet is to replace the offending link or links.
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Old 03-30-09, 03:10 PM   #3
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It didn't seem to skip in any gear but 8, but I'll check that out, Thanks for the fast reply
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Old 03-30-09, 03:45 PM   #4
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From the sounds of the incident, I would say another likelihood is something bent, like the hanger.
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Old 03-30-09, 04:30 PM   #5
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From the sounds of the incident, I would say another likelihood is something bent, like the hanger.
+1 Take a look at the derailer from the back. The jockey wheels on the derailer should line up in a straight line with the derailer hanger. I suspect that yours will be bent inward some. If you take a 5 or 6mm allen wrench (depends on what size your bike has and you'll need a long handled one), you can put it in the derailer bolt at the 12 o'clock position (or close to it). Apply pressure to the allen wrench so that the top moves towards the frame. This will bend you derailer hanger outward. Make minor adjustments and bends until the jockey pulleys and the hanger are in the same plane.

You may want to look at the hanger to make sure you didn't bend it out of the plane with the frame, too. This can also be fixed in the above manner.

Be careful about bending the hanger too much, however. If it's aluminum, it won't take much working before it breaks. If it's too tweeked, look into a replacement.
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Old 03-30-09, 05:13 PM   #6
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Ok now that I have nursed my wounds I took a better look at the bike.
the chain skips when the brass colored link gets to the #8 gear i assume i should replace the link and then see if it works.
everything else did look normal and not bent

after doing a search this link is called a sram gold power link it seems to be loose/ wobbely on my bike should it be replaced?

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Old 03-30-09, 05:26 PM   #7
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after doing a search this link is called a sram gold power link it seems to be loose/ wobbely on my bike should it be replaced?
Is it partially disconnected or bent? Could be one side came detached and it's just hanging by the other. Alternative is that since the side plates are thinner it could be bent. Shouldn't be sloppy fit wise, should be just like another link.

-R
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Old 03-30-09, 07:12 PM   #8
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Make sure the power-link is fully secured by giving it a pull from both to the left and to the right on the chain with the power-link in the center. If this doesn't help, try a new power-link - LBS has 'em - and see if that doesn't do the trick. But nonetheless, I'd wheel the bike to your LBS and ask them to check the alignment of the derailleur-hanger. They should have the ($70) tool for doing this. If curious - look up the Park Tool DAG-1 or DAG-2 in Google. Now if it's out of alignment, they can easily bend it back perfectly with the tool. It's a quick and painless operation.

Anytime your bicycle takes an impact - even from falling over - on the right (drive) side, it may have bent the derailleur-hanger. Better to have it checked under these circumstance, than merrily riding about the town on a bike that's missing a gear or three.
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