Originally Posted by
Papa Tom
All this said, what are the non-visual warning signs of a cracking head tube? My whole 20-year-old frame is covered with tourist decals and my eyes have gotten pretty sucky in the past few years. Is there anything I might feel or hear that should give me a heads-up?
The gold standard for crack detection in steel is
magnaflux.
However, unless you have a specific reason to be worried you might do what millions and millions of cyclists have done for years and trust your steel frame until it gives you a reason not to.