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Bent frame

Old 07-29-08, 04:01 PM
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AGGRO
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Bent frame

Wierd thing happened on my tri-bike. Coming to a light I shift down and pedal, light turns green so I start pedaling and shifting rings when all of a sudden I'm heading to a screeching halt. It appears the rear derailleur rolled too far and jammed in the spokes. The hanger and derailleur are a mess and worst of all, it slightly bent the hanger piece (it slips me what that is called but part of the stay) slightly out. I need to bend this back but don't want to completely render the frame useless. It's aluminum of course. Didn't even bother the spokes!
Any suggestions? Trek said they would give me a partial allowance for a new bike but I can't afford another 2 grand for a bike.
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Old 07-29-08, 04:45 PM
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Originally Posted by AGGRO View Post
Wierd thing happened on my tri-bike. Coming to a light I shift down and pedal, light turns green so I start pedaling and shifting rings when all of a sudden I'm heading to a screeching halt. It appears the rear derailleur rolled too far and jammed in the spokes. The hanger and derailleur are a mess and worst of all, it slightly bent the hanger piece (it slips me what that is called but part of the stay) slightly out. I need to bend this back but don't want to completely render the frame useless. It's aluminum of course. Didn't even bother the spokes!
Any suggestions? Trek said they would give me a partial allowance for a new bike but I can't afford another 2 grand for a bike.
Most road bike have replaceable deraileur hangers, doesn't yours come off? Or did the bend go further up the stays???
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Old 07-29-08, 05:22 PM
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I think the deraileur hanger is part of the right hand dropout.

I think only cheap discount bikes have a replaceable deraileur hanger, Rogue leader.

Since the bike is aluminum, it might not be possible to straighten the deraileur hanger. It might straighten, or it might break off.

You could get a deraileur hanger off a cheap bike, and secure it with the axle nut, just like a cheap mass merchandise bike. (I'm holding my hand over my eyes...).

If that doesn't suit you, you could make a fixed gear track bike of it.

I feel sorry for you.
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Old 07-29-08, 06:03 PM
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Originally Posted by hotbike View Post
I think the deraileur hanger is part of the right hand dropout.

I think only cheap discount bikes have a replaceable deraileur hanger, Rogue leader.

.
Your thinking is wrong.
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Old 07-29-08, 06:07 PM
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Can't help you on your specific problem, but I ran across this website:
http://www.yellowjersey.org/rlfix.html
on which they show repair of some pretty severe damage. I don't know how practical, how common, or how costly this kind of work is.
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Old 07-29-08, 06:43 PM
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I really can't say without looking at the bike, but there are at least two possibilities.

1. Does your bike have a replaceable derailleur hanger. Most bikes with aluminum or carbon frames do. If that's the case, go to derailleur hangers dot com and try to find one that matches. Buy 2 so you won't have to wait for shipping the next time this happens.

2. Can you ride the bike the way that it is? I'm guessing not. If that's the case, what do you have to lose? The best way to tweak a derailleur hanger back into place is with a Park or similar gauge tool. Horror stories not-with-standing, I think that most hangers have one bend back in them. If it was my bike I'd try it. Matter of fact, when it was my bike I've done it.

Good luck.
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Old 07-29-08, 06:51 PM
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Originally Posted by hotbike View Post
I think the deraileur hanger is part of the right hand dropout.

I think only cheap discount bikes have a replaceable deraileur hanger, Rogue leader.
If you consider Argon, Cervelo, Cannondale, Specialized, and Qunitana Roo among others cheap discount bikes, then sure.

to the Op if you need one try http://derailleurhanger.com/ they can probably hook you up.
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Old 07-30-08, 10:12 AM
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Originally Posted by Rogue Leader View Post
If you consider Argon, Cervelo, Cannondale, Specialized, and Qunitana Roo among others cheap discount bikes, then sure.

to the Op if you need one try http://derailleurhanger.com/ they can probably hook you up.
Shows how long it's been since I looked at a road bike.
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Old 07-30-08, 10:35 AM
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Originally Posted by hotbike View Post
Shows how long it's been since I looked at a road bike.
Thats ok, 4 months ago I knew absolutely 0.... now I know about 0.5
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Old 07-30-08, 06:39 PM
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Thanks everyone. This is a trek hilo, not a cheap bike but not a "expensive" tri-bike either. It has a replaceable hanger but it trashed that +. I've heard I can heat it and bend it back with good results. That would also require some paint.

Anyone bend an AL bike hanger/drop back into place and have good shifting results? Argh I don't need to shell out a bunch of cash for a new frame right now.
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