How many psi do you guys recommend for 20'' Yokohama S drives? Different sources seem to say different things. I didn't really find any official ratings from the manufacturer. Is there a way to calculate it?

My tires are 245/35/20 and 275/30/20.


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doesn't it say a maximum PSI of 40 on the tires? i'd put it on 35 PSI

or u can read this article on tirerack...

Tire Tech Information - North American Load and Pressure Markings

 

They hold the same amount of air as the oe size, just in a differ shape. OEM pressure as a minimum will be ok, don't exceed the tire's max on the sidewall.

 

Yea I saw that Tire Tech link too. The reason why I'm asking is that it seems some people with aftermarket wheels/tires are running higher psi than the factory recommendation (I think 34-35 psi). Just wondering if there's a reason behind that.
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I'm running 35psi.