HP,
The BMW table would make perfect sense if you were to enter it with pressure data. "So I have 2.2 and 2.2, that means I have 19" wheels on the front and 18" wheels on the rear...."
These tables need to be designed so that you go in with the wheel/tyre size (nicely grouped) on the left, and you read the answer on the right.
To me the BMW table has been designed by someone clever, who has missed the point entirely!
