all the garages round my way seem to put putting in the new style digital air compressors and charging 20p to use them
but i was just wondering how accurate they really are as i pumped all my tyres up to 38PSI last week at the local BP petrol staion and went to check the pressures today as i normally check tyre pressure once a week
but someone had cut the end off the one at the BP garage so i went to the local jet garage and their readout said all my tyres were 34PSI
so 4psi there seems to be quite a difference between the two
ok i know tyres lose pressure but not normally exactly 4PSI from every tyre
so are my tyres now at 38PSI or 42PSI??
i dont have a another air pressure gauge (yet) so i cant tell!!
just curoius to see to what actuacy these things are supposed to at as i would have thought that they should be pretty accurate but from my experince they don't seem to be