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rear wheel alignment rubbing chainstay.

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rear wheel alignment rubbing chainstay.

Old 07-18-11, 09:53 AM
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rear wheel alignment rubbing chainstay.

hello folks!

My first post here, I need some advice. My cannondale cross bike has an issue with rear wheel alignment. I set the wheel straight and clamp it down with the quick release, but after I hop on a ride, the wheel moves back to where it's rubbing on the chainstay.

I flipped the bike over so I could fool around with the wheel in the drop outs and I notice a little "wobble" on one side. when the wheel is just naturally sitting in the drops it is rubbing the chainstay. I have to correct the wheel to get it away from the chain stay, so that when I ride the rear wheel "Wants" to go back to the position where it rubs?!

does anyone know what I'm talking about? does it mean my frame is bent?

it's an aluminum 2005 Cannondale Optimo, it has been raced one full cross season, and ridden as a communter/ everyday for the three years that I have owned it. I've read that aluminum can stress... whatever that means? Are the Awesomo's days numbered?
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Old 07-18-11, 10:10 AM
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CX_Skidmark, A friend's steel bike with vertical dropouts had the same problem. I used a round file to remove a small distortion in the upper curve of the dropout and it worked. This was a long time ago so this sentence may apply to another bike, but I think for one reason or another I added a washer to the axle because the QR was tightening more so on the axle than the dropout.

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Old 07-20-11, 08:15 PM
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I'm dealing with the same problem on a steel frame. My fix in the office was to take a picture hanging hook (one made out of a flat piece of metal) and bend it until it fit into one of the dropouts. The rear wheel alignment improved a lot. It isn't permanent, so the filing option sounds promising.
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Old 07-21-11, 07:51 PM
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I overhauled the rear hub on my wife's old Giant MTB. I had put spacers in wrong or something and that put the wheel right into the chainstay.

I took it apart again and tried a different combination, and everything was A-OK. Try that kind of stuff before taking a file to anything.
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Old 07-28-11, 09:20 AM
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My hub was all messed up, wonky with play. perfect excuse to replace my 6 year old stock wheels!! lol thanks guys!
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