Rounded Stem Bolt- HELP!!!
My headset has come loose and I need to tighten it up but one of the 3 allen bolts that clamps my stem around the fork steerer is rounded off. I don't want to destroy the stem or the fork steerer and so far, have tried a number of things including, penetrating oil, heat, brute force (accompanied with expletives) allen keys and those star shaped things similar to allen keys but nothing has worked. Any ideas? Thanks, harry