I check tyres on every 3-4 trips for fuel based on these strict, scientific measures :
1. It has been 3-4 trips since last time, or I can't remember
2. There isn't someone already using it
3. The machine isn't one that charges.
4. There isn't someone who isn't using it who has parked in front of it whilst they buy sweets or whatever other shopping is now available at what should be a normal petrol station.
Otherwise I inflate at home with a machine I got free for joining the AA years ago, and check with a good old fashioned tyre pressure gauge.
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[I]So long and thanks for all the fish.[/I]
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