I don't pull mine around too much these days, I bring the wood to the splitter now more than I used to. I let a few good guys borrow my splitter now and then, it maybe sees the road 3 times a year at most. As far as tire pressure goes, my splitter has on it F/78-14s. I took them off of my 57 ford in about 1986. They have never been patched, I maybe add air about every other year and I just put in maybe 5-10 psi. I don't check it, I just make sure they don't squat much. Equipment without suspension, like cement mixers, concrete saws and such ride much nicer with lo air. I knew one guy that had 20" truck tires on a light splitter. He could run those tires with nearly 0 psi, just enough to keep the beads out.
HI JW, I sure like your splitter,
I see the wisc twin, They, are a great engine, How many gpm are you running? at what RPM? What size cyl? I support hoods on splitters, dont see many, why not, I wonder,..Nice setup Jerry, Eric :clap