On Thu, 18 Oct 2018 11:36:28 +0100, "Jim GM4DHJ ..."
wrote:

After a puncture and a ruined tyre I tried to put back on an old 28 inch
bike tyre that WAS on the bike years ago only to find its diameter was now
far to big to fit the rim....is this normal ?

It's the bead that normally determines how well a tyre fits a rim and
as they are normally kevlar or steel I find it had to see how it could
have 'grown'?

Cheers, T i m