earlier today one of my neighbors asked me to help him fix a flat. it appeared that the tire had slipped off the flange at one point - a large tear in his tube seemed to confirm this. when i checked out the rim, the flange was dented about 1mm in at a small point.
i ended up telling him that i couldn't fix his flat because his rim was dented. what i couldn't tell him is if this could be fixed. i didn't want to attempt it myself. is it possible to straighten the flange of a rim, or is his wheel toast?