i've used walker evans and spiderlocks for a few years each. walkers easily 10/10 and spiders 8/10 but only because they are a pain to clean out mud, snow, ice and airing up/down is suckier and they are more expensive.
i like that spiderlocks are normally wider than walkers.
both are balanced very very well so only tire choice will affect balancing issues.
dropping down in air pressure severely decreases fuel economy...
rims alone are around 40lbs each.
16,17,18 inch rims normally mean tires with thicker sidewalls so much more stable and dependable at very low pressures.
i often run mine at 0 psi because I have 18" rims and 35x12.5 E rated tires so they are still quite stiff ... others though have a tough time dropping below 5 psi because their sidewalls are too soft or they are just panzies.