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Derailleur thrown into spokes(9 posts)

Derailleur thrown into spokesdave woof
Jun 9, 2003 8:44 AM
I was on a group ride Saturday, a gal shifted into her biggest cog, probably a 25 - and the derailleur went into the spokes. Damaged derailleur, broken spokes, bent hanger (steel, non replaceable). She had bought the bike in February - a Lemond. No spoke protector.

My question is, who is responsible - shop who sold her the bike and set it up, or her for shifting into the spokes?

Assuming here the shop adjusted everything on her bike. I don't think she knew how to adjust rear derailleur.

Dave
sounds like shop to meDougSloan
Jun 9, 2003 9:08 AM
I'd say shop is responsible, unless she changed something. You should not be able to "shift into the spokes."
this assumes she returned the bike now and then for tuneup, frequently provided for free. If she went 5 months with no tuning up, I'd say her fault.

Doug
Sounds like the shop's responsability to me.Spoke Wrench
Jun 9, 2003 9:12 AM
I'm thinking the low gear limit screw wasn't adjusted correctly. The last person to screw with that screw is responsible. In my mind, there's some room for doubt.

Your message had a couple of things that puzzle me a little. I'm surprised the bike didn't come with a spoke protector. I know that everybody takes them off because they think that they look dorky, but this is a case that demonstrates they have a function. I'm also aware that derailleur limit screws seem to be the first thing that amateur bike tinkerers fiddle with. I wonder if the bike shop people were the last to wrench on this bike.
It could be eitherTWD
Jun 9, 2003 9:25 AM
If the shop set it up wrong it's their fault. Those limit screws have a purpose.

When I shift into my biggest cog, I never worry about overshifting into the spokes. I just push the lever as far as it will go, knowing that my limit screws are set properly. If it's set up right, you shouldn't have to think or worry about it.

Now, proving it's the shop's fault and getting them to pay for the repair is another matter. If the hangar and derailluer are all bent out of shape, it may be hard to tell if the limits were set wrong, and even harder to prove who set them that way.

Now, lets say the limit screws were set right and the derailluer was adjusted correctly, I can think of a couple of other possibilities.

A tight or bent link in the chain (maybe from a rider who has a tendency to shift under heavy loads) can cause the chain to skip quite a bit. If the chain skipped as she shifted into the biggest cog, it could skip off into the spokes even if the limits are set correctly. Not as likely, but still possible.

Another possibility is that the chain was too short. I've seen the same result when people have broken a chain and taken a few links out, then later shifted into the big ring/big cog combo. If this happens under heavy load, the derailluer will explode, the hangar will get bent, and the whole mess can end up in the spokes. This would only happen if she was in the big ring of course.
Her faultmohair_chair
Jun 9, 2003 9:26 AM
I would guess that she has used that cog a couple of times since February and the derailleur didn't go into the spokes. What was different about this time?

If the shop set the limit screw wrong, she would have known it fairly soon, like back in February or March. June seems like a long time for a problem like that to stay hidden.

I'll bet she bent the derailleur or the hanger not long ago, when she bumped into something or when she laid the bike down somewhere on the derailleur. After that it was only a matter of time.

As for spoke protectors, most people I know take them off. It won't stop a derailleur anyway. Spoke protectors keep the chain from getting wedged between the backside of the cog and spokes, which tends to tear the wheel apart. Lack of a spoke protector had no effect on what happened.
Bent hanger or ginked....Rusty Coggs
Jun 9, 2003 10:26 AM
derailer are possibilities that work for me too. unless the shop had fiddled with it the morning of or day before,it's hard to pin it on them.
I think she's SOL...biknben
Jun 9, 2003 10:47 AM
It's unfortunate that it happened but it's no more the shops fault than hers. Unless that hanger is bent 90*, it can be bent back. She's gonna have to caugh it up for the repair to her wheel and a new deraileur. The shop may cut her a break on the repair but I wouldn't expect more.
re: Derailleur thrown into spokesbrider
Jun 9, 2003 1:48 PM
I've had this happen three times. One -- MTB, stick gets thrown into rear der. Not even in big cog. Total melt-down of drive train.

Two -- overshift into spokes. My fault totally (I wrench my own rides). Detonated rear mechanism, 6 spokes nicked deeply, bent hangar.

Three -- in a race, climbing, on third to largest cog. Rock somehow ricochets off front tire and goes into rear mech (some magical forces at work here). Again, total melt down. Hangar was okay. Replaced rear mech and chain, and was ready to race the next day.

I agree with other posters -- it may be shops fault if they had wrenched it VERY recently. Like that morning or the day before. Otherwise, SOL.
re: Derailleur thrown into spokesxxl
Jun 10, 2003 5:01 AM
No one said anything about it, but can the derailleur hanger be bent back? Since it's steel, it shouldn't be a problem, unless the damage were extreme.