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Am I the only one who finds bar numbers overly , not sure the expression, but 4 bar is 58 psi and 3 is 43-44. Big big difference....
One bar is very close to one atmosphere of pressure. So yeah, one bar is a lot. I am not sure if the term bar came from
barometric pressure, but mentally I think of it that way. That makes it easy to remember.
At least we are not talking about kg/cm^2 anymore, I never could figure out what to do with that, I had to tape a conversion table on my pump to figure out what each tire needed.