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It's possible for a RD hanger to get bent, even on a new frame. There is also the possibility of paint build-up under the RD hanger, causing it to mount crooked. I'd check that first. Park Tool sells a RD hanger alignment tool to check the alignment and straighten the hanger if needed.
http://www.parktool.com/products/detail.asp?cat=48&item=DAG-1
It's possible for a RD hanger to get bent, even on a new frame. There is also the possibility of paint build-up under the RD hanger, causing it to mount crooked. I'd check that first. Park Tool sells a RD hanger alignment tool to check the alignment and straighten the hanger if needed.
http://www.parktool.com/products/detail.asp?cat=48&item=DAG-1
