A couple of years ago when I bought our Winnebago Motor Home in Florida we were aware that the tires were way past date code safety.
So, with the help of a veteran RV'r, I had 6 new Cooper Roadmaster "truck" tires put on. Needed to do this for the trip back to Pa.
The reason: Better tire characteristics, and certainly cheaper.
Result: I don't have much to compare the ride too, but when I'm on a reasonably smooth road, the ride is smooth. When I hit a bump or hole, I know I hit a bump or hole. The tires are very stable and I detect NO side sway or 'mush' in the tires. Passing trucks just give me a very gentle push to remind me that they're there.
I run the fronts at 105psi and the rears at 100psi.
I am very satisfied with these tires. I realize that I'm driving a big brick down the road and I expect some trade-offs.
Overall, my unit rides smooth, very comfortable in the coach over the long haul and we're quite satisfied. I have not replaced the original shocks...they seem to be working fine. I did replace the rear stabilizer bushings with the new poly bushings soon after I bought the unit.
I expect that when I reach the 6 - 8 year mark, I may consider the same as replacements.
2001 Winnebago Adventurer 32V, Ford F-53, V-10
2008 Jeep Grand Cherokee Limited, 4.7L V-8 QTII
U. S. Army Vet, In God We Trust