Handbags   (The sad, the bad and the ugly. Non-productive stuff here.)

Why would anybody want to blow up their tyres in the first place, 'cos then they'd go all raggedy and you wouldn't be able to drive? Increase tyre pressure yes, but don't blow 'em up folks.

If you live in the vicinity, Pemberton Tyres do all four for the princely sum of nowt! I take mine there every time my car starts complaining.