Firstly they haven't an inner tube fitted. Secondly I managed to get the offending tyre off the rim to inspect it for glass, tears, rips etc but found nothing. Upon trying to re-fit the tyre to try and blow it up i bent 3 screwdrivers trying to lever it back on , mashed up sealing rim of the tyre , put numerious scores on the rim , threw it across the garage several times and just got completely p****d off with it :mad: . I have now purchased 2 second hand wheels and tyres from a guy down south but I won't be out shang-a-langing this weekend, got to wait for the cheque to clear :(