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Rear Der limit screw won't protect my spokes

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Rear Der limit screw won't protect my spokes

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Old 09-16-11, 08:18 PM
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zacster
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Rear Der limit screw won't protect my spokes

I have a Campy Chorus 10sp setup and the rear derailleur hits my spokes. I tried to adjust the screw so it would limit the travel but it is already all the way in. I had Campy wheels on it too for a while but have since switched, and both had the same problem so it isn't the wheel dish.

Can I put a longer screw in there?
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Old 09-16-11, 08:52 PM
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Something seems awry, the low limit screw, which should be capable of adjusting the stopping point to where you can't even shift into the largest cog, much less go past and hit the spokes. Forgive me for asking but you ARE certain you are adjusting the correct screw, right? The "B" screw won't have any effect on the travel toward the spokes, nor will the high limit screw.
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Old 09-16-11, 09:07 PM
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Are you certain the derailleur or the derailleur hanger aren't bent?
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Old 09-16-11, 09:37 PM
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Originally Posted by oldbobcat View Post
Are you certain the derailleur or the derailleur hanger aren't bent?
+1,

The distance from the outside face and the first sprocket is typically about 10mm or so, and is roughly the same on all bikes, varying by only a few millimeters depending on hanger thickness. That distance is designed into the RD so the only way the limit screws wouldn't be able to work right would be if the cassette were narrower (old 5s bike maybe), or the hanger is bent, putting the RD's cage inboard of it's normal range.
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Old 09-16-11, 10:13 PM
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I concur; bent hanger or D/R. Probably the hanger....
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Old 09-17-11, 07:54 AM
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I think you all may be right on this one. It doesn't look straight when I look straight from behind. It is probably the derailleur as the only real crash happened on the original frame that cracked. The hanger is new with the new replacement frame (Kuota Kredo carbon) and I transferred the parts myself. Of course none of it is really new anymore but this one hasn't been crashed. I may break down and actually bring this bike in for a professional tune-up. I haven't had anybody else work on my bikes in 30+ years.
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