With my 4/4, either 18 or 19 was the factory recommended pressure. I tried it, once, and swiftly inflated the tyres again.
After a lot of experimentation, I settled on 22 front, 23 rear and much to my surprise, these pressures were right for 165/82 (the tyres weren't labelled as such, but that's what they were) 185/65, 195/50 and 195/60.
Competition, minimum 28, maximum 32 and same front and back (most of the things taken out were behind the centre of gravity)
