JoeH wrote:

At least you were parked and caught it-- would have likely been a blow out if you were dirving and who knows what damage might have occurred. Look to replace the extensions with solid valve stems ( Borg is one that's out there ) ..... I had an extenstion go bad, but I was driving. Thankfully no damage to the MH, but ruined a 1 year old tire-- I immediately trashed the extensions and installed longer valve stems