I have new Duratrax 33x12.50R15 tires on a 2001 TJ. I am running 15x8 3.75BS Soft 8 wheels.
They ride on the center portion of the tread. I have aired down to 25psi for street. The outer 1" and inner 1" of tread still does not seem to be touching the ground. I know this because I have driven on my wet driveway and looked at the water pattern on the tire.
I worry, possibly out of ignorance, going any lower wouldn't be safe. The only idea I came up with is going to 15x10 wheels. Any ideas?