An aside:
I work in a petrol station. Yesterday, a customer came in, having fuelled up his brand-new Mercedes.
"Do you know anything about tyre pressures?" he asked.
I nodded.
"The plate on the door says '200', front and rear", he said, "I haven't a clue what that means."
200?! Our machine does PSI or atm. Go much above 60 in the former or 4.0 in the latter and you'll cover the forecourt in tiny bits of rubber.
I went out to his car.
"200 kPa."
Ah! Now I don't know whether this is a New Thing, but it seems like the Germans, at least, are using SI units for tyre pressures.
Much more sensible, from an engineering point of view, but utterly unworldy, given the tyre pressure machines you'll tend to find on UK forecourts.
Andy