Hi,

I have friend with serious cracks in his headtube. Everyone says it is toast.
He knows it is as as he can feel it riding the bike and he won't do certain
stuff he used to do on the bike. If it feels solid it probably still is, if it
doesn't then well of course it isn't, adjust riding style to suit safety.

rgds, sreten.

Interestingly (perhaps) I got involved when he was discussing some
some small cracks at the bottom of his head tube. I had a look and
had to be shown where this "bad crack" was, it didn't look too bad.

Anyway after perusing it over I turned round and said "you think
that's a crack, that is a crack", pointing at a huge (relatively) 1/2"
crack in the top of his headtube he had somehow not noticed.