Sorry. I can't seem to find time to search existing threads for my answer.

I just purchased my first set of fat slick tires - Schwalbe Big Apple 26" X 2.35"s to be specific. My first mistake was inflating them to 50 psi, at which they don't feel a whole lot different than the 1.5" Specialized nimbus tires they are replacing.

I've heard these can be run at as low as 30 psi. I am riding a 1996 vintage steel GT Outpost mountain bike and I weigh about 165 lbs. My rear rack carries about another 3-5 lbs worth of "stuff," I'd estimate. I will be riding 98% on concrete and the rest on packed dirt and maybe some rocks.

Can somebody suggest a good tire pressure without referring me to another "chart" or conversion guide?