okok... I did a search... both on the org and via yahoo... for "proper" tire pressure with non-stock rim/tire setup.

I know it should be 32psi all around for stock 17", but what is good if you have a different size? Is it around 32 for all diameters and profiles?

Currently I have 18"*8" rims with 245/40 18 tires running 35psi upfront and 33 behind. Is it enough? My tires seem a bit "flat." What should I use as baseline in this case? Still the 32psi all around?

Searched, but after a couple of days... feeling lost.