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I'm guessing my derailer (or hanger) is bent?

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I'm guessing my derailer (or hanger) is bent?

Old 03-15-09, 07:44 PM
  #1  
JasonC
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I'm guessing my derailer (or hanger) is bent?

See picture.... I think the angle of my derailer is a little exaggerated by the way I took the pic... but regardless, I'm guessing it shouldn't be angled like this?

Thanks in advance,
Jason
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Old 03-15-09, 07:52 PM
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You are correct, this deraileur should not be angled like this. It should run parallel to the plane of the wheel. I can't tell from the picture if it is the deraileur or the hanger that is bent.
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Old 03-15-09, 08:07 PM
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Steel framed bike (I hope) - right?

The bad news is that you definitely have a bent derailleur hanger. That's a fairly common malady.

The good news is that, since you only have 7 cogs in back, you can probably fix it yourself. Leave the derailleur bolted in place - that's important. Now find a BIG cresecnt wrench and clamp it over the bolt that holds the derailleur onto the frame. Tweak it back until the derailleur arm points straight down and you'll be good-to-go.

Aluminum framed bikes are touchy. It's usually possible to bend them back one time but the hanger may snap off. That one is bent badly enough that I doubt you can ride it very well the way it is so you don't have much to lose by trying.

Bikes with more cogs have them spaced closer together and consequently they are more particular about having perfect derailleur hanger alignment. For those bikes a hanger alignment gauge is necessary to get them to shift right in both directions.
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Old 03-15-09, 08:14 PM
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After taking a closer lok at the pic I agree with Retro that it is definately a bent hanger. His advice is good, and you can fix this yourself if it is a steel bike.
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Old 03-15-09, 08:17 PM
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BTW when bending dropouts and hangers on aluminum frames it is helpfull to heat the area with a small torch before bending it. THis can help reduce fatique enough to keep it from snapping off.
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Old 03-15-09, 08:22 PM
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It is aluminum. I may just take it to the LBS... probably a $10 thing.

Of course, the last comment about the heating is a good one... makes me wonder if the shop would think of doing that.
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