I have them on my motorhome, and the ride sucks. hence the name sucker. I added all of the suspension like steer safe, koni fsd, tru track. What I really needed to do is to replace my new kuhmos with motorhome tires. Kumho's are truck tires, and are very stiff. I feel they are safey and will not blow out because of the load rating. My rig weight 19k, maybe a heavier rig will challenge the sides walls like a big truck will. I only buy michilen for my cars and suvs, I would by them, but my rv came with new kuhmos, your life is riding on them. I plan on buying new tires for my caddy. sears wants 155each tire, but said they;ll price match even a web site. I found them online for 105. I plan on going down there with the web site in hand. I think you need experience when mounting and balance big tires. so I would go to sears, but enough gossip for now. good luck.