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Old 08-15-06, 09:38 PM   #1
BrokenGlass
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lateral movement in rear derailleur

While inspecting my bike and re-greasing it, I found that I could move the rear derailleur (Shimano Acera) laterally about a quarter of an inch. This was achieved by holding the derailleur at the lowest point (just under the pulley). The derailleur is not loose at the frame. I checked that first. Is this a sign that its shot or is it normal to have that much play. Shifting has not gone screwy yet. I just donít want to be out somewhere putting some force down and the thing breaks leaving me dead in the water. Thanks for your thoughts.
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Old 08-18-06, 02:41 PM   #2
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I'm not sure what you're doing exactly, but my derailleur does not move in any direction when I try to move it from the very bottom of the cage. It doesn't sound good, but I'm hesitant to tell you to buy a new one. Does it wiggle on all the cogs or just some? Maybe you'll get some more feedback from others. P.
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Old 08-19-06, 03:26 PM   #3
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i'm not sure if theres movemt while acrually riding, btu i know its there when the bikc if in a stand and by using my fingers to move the cage.
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Old 08-19-06, 03:33 PM   #4
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I do think that this is an indication of some slop or play in the parallelogram and/or cage connection, and this normally does happen with age. Nothing much you can do about it, except replace the derailleur with a new one eventually. The worst that will probably happen until then, is that your shifting might get a bit sloppy. It isn't much more likely to break, than it would be otherwise.
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Old 08-19-06, 04:02 PM   #5
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Quote:
Originally Posted by lawkd
I do think that this is an indication of some slop or play in the parallelogram and/or cage connection, and this normally does happen with age. Nothing much you can do about it, except replace the derailleur with a new one eventually. The worst that will probably happen until then, is that your shifting might get a bit sloppy. It isn't much more likely to break, than it would be otherwise.
That's correct. This sort of play is not unusual, and it can actually get quite severe without actually causing a problem in practice, because the spring tension mostly keeps the slop from flopping.

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