Yep! you'll find tyre fitters arguing with you re. the 22 psi when you change them but that is the factory recommended setting. The cars are so light that they really add little load to the tyres and to keep the tread fully in contact with the road 22psi is about right although you might have to play around very slightly as different brands have varying wall stiffness and this will have an effect on getting the maximum contact with the road and, as has already been said. the tyre is the first part of the overall suspension system. For instance if you are finding your suspension a tad hard you could consider upping you tyre profile to 65 from 60 and this will give you a diameter increase of around 20mm, a greater ground clearance of about 10mm but will improve the ride quite a bit. Not sure what is standard on your age 4/4 but I'm sure they had 15" rims with quite a large profile but going up to 65 from 60 will make little difference to the registered speed. How ever before any real assessment can be made a perfectly working and serviced suspension system is your first starting point. such small differences say through lack of service or poor adjustment can make a great car feel like a shed!
