Large Ship wheels have serious design flaws
I began on Pertam and it's a planet perfect for wheeled vehicles. I built and use small ship wheeled vehicles a lot. After I have enough resources I built a large ship wheeled vehicle. Problems I encountered:
1. Wheels don't have enough traction to move the vehicle even slight uphills (I overcome this issue by using powerful wheel mod)
2. Suspension has two problems:
a. There's no min/max suspension height, so wheels get destroyed if suspension squeeze in to allow wheel base touch ground.
b. Suspension strength doesn't seem to get harder as it squeeze in.
With these two problems, suspension doesn't work well. If I increase suspension strength further, then some of the wheels don't touch ground most of the time that makes vehicle lose traction even more.
I reported these issues as feedback two years ago but I think they should be considered as bug at this time since you've made a planet for wheeled vehicles.