most home guages or pumps you have in the boot of car dont work on bar and the ones at the petrol station certainly dont, rather go on PSI, so some people may not know what the hell you are talking about hence why PSI is mentioned in earlier posts
Bar is cool -- and is what we should really be using in Europe. Pounds per Square Inch = PSI is going to mean bugger all to someone from France, Latvia or Poland!
Bar = atmospheric pressure at sea level (IIRC) = 14psi.
Strangely, my local Tesco has psi and bar, while the other local garage has a readout switcheable between the two.
i run 31.5 psi on the front and 33psi on the rear, seems alot more prone to understeer though but i guess its having useless ditchfinder tyres (nankangs) on the front.