Bicycle Mechanics - Clicking rear derailleur hanger?
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Just strange. A few days ago, I noticed a clicking on my bike. It only happened when I was on a flat in high gears or climbing. I thought for sure it was my bottom bracket, but tonight, while changing my tire, I really examined my back wheel, and when I slowly spin the wheel using the pedals, I found the source of the clicking. It's not even the derailleur... it's the deraillerur hanger.
Anyway, I have the Campy Veloce. Anyone have an idea of what I can do to stop the clicking, or is this a sign that the hanger is just under stress and I need a new one?
Thanks for any productive advice.
Does the hanger move when you push or pull on it?
There's a tiny bit of play, but I don't think that's anything out of the ordinary, is it? It takes a little effort to wiggle it side to side.
Since you can wiggle it, that may be the problem. There should be an allen head (5mm) on the outside -tighten this. If it just spins, then you will have to somehow hold the back receiving nut. This can be difficult as it is flush mounted, but sometimes a small flathead set into one of the two notches will be enough to hold it. Otherwise a special tool most shops have will do the trick.
But if you lucky, your hanger uses 2 phillips or 2 small allen screws to attach it. Tighten them.
Any movement in the hanger is not good. It can affect the shifting. It means the hanger may be damaged sooner. And I think if it was tight, your click might just go away.
Thanks for the advice. When I wriggled it, this morning I rode, and there were no clicking problems. But I will tighten it.
Again, thanks all.
08-10-05, 10:50 AM
some wd-40 should lighten down on the deraillier clicking...i had a simular problem...it doesn't stop it...it just lightens it up and you don't hear it as much
That's ok. I don't put wd-40 on my bike... ever. I do have some bike grease, so I lubed up my chain, but that didn't work to stop the clicking. That's when I posted on bikeforums.
08-10-05, 06:06 PM
I just want to clarify, I don't think you mean the hanger--the part of the frame that the derailleur is attached to. I think you mean the *cage*, the part of the derailleur that hangs down and has the idler pulleys in it, is that right?
Yeah- it's the cage part.
08-10-05, 06:52 PM
Okay, then I think it's probably more of an alignment problem. Maybe your cable just needs to be adjusted so that the chain is coming onto the pulleys as directly as possible. I had one that did that, and adjustment of the derailleur cable seemed to take care of it. The other possibility I can think of, is that the lower pulley has some sort of problem when it rotates, but I don't think that's it. I would try adjusting the derailleur cable first to improve the tracking of the chain onto the lower pulley when it's in those troublesome gears, and see if that takes care of it. Mine did it most when in low gear (the *biggest* cog on the cluster) so the cage was the most stretched out. That's when alignment problems are magnified. So try adjusting it in whatever gear is giving you the most trouble.
I do remember that the chain fell off after I had to do an awkward stop on a suddenly steep hill. I get the feeling that the incident caused this clicking stuff.
08-10-05, 07:05 PM
Hmm. It's possible that there was something that knocked the derailleur out of adjustment, especially if anything struck the derailleur or the cage or if it got wrenched somehow. Hopefully it's just out of adjustment now, and can be easily remedied by fine-tuning your cable. If the clicking seems to be isolated in just that lower pulley wheel (look closely when it's clicking to see if the whole cage moves when you hear a click, or if just the lower pulley wheel moves, try to narrow down the source) then it's easy to replace the pulley wheels. I'd try that next. If you think that the derailleur might have suffered a blow that could have bent the attachment point on the frame, that would be the next thing to check out.
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