In the July 2009 edition of "MotorHome" magazine "techsavvy Coach & Chassis" editor Wes Caughlan Wrote:
" While working for major tire companies for more than 25 years as a forensic engineer, I pretty much set the seven year limit (for replacing motor home tires) after discussing it with my clients (the tire companies). There is nothing sacred about it, though, it's an average thing. Some will last longer, and a few will fail sooner. It largely depends on storage.
Tires will last longer on motorhomes that are stored inside, and have their tires shielded from ultraviolet exposure and atmospheric chemicals that degrade rubber. If you motorhome is stored inside when not in use, and there are no visible cracks in the tire sidewalls, the tires may be good 10 years, but no more.
We recommend changing all rubber parts every ten years, that includes fuel lines, brake lines, vacuum hoses, coolant hoses, window weatherstripping, body mounts and any other critical rubber parts. Rubber lasts just so long, and it's better to be safe than sorry.
An old tire usually blows out and does a lot of collateral damage to the motorhome. That's why I don't believe in being a penny wise and a pound foolish"
Now before you all start shooting the messanger, remember I didn't write the article I merely reported it, so....
I personally find the TOTAL rubber replacement a little extreme and a lot expensive. How many people replace ALL the rubber parts on cars 20 years old? When was the last time you replaced a body or engine mount? Does that mean window and door trim as well?
I personally believe hoses, tires and belts should be inspected prior to each trip and inspected thoroughly annually and any hoses found to be cracking or getting hard to the touch should be replaced. While some motorhome tires undoubtedly last ten years, and his seven year recommendation is probably OK, after all the Alpine blowouts I have heard about on six year old tires I believe anyone going beyond 5-6 in and Alpine, or any similar heavy Diesel motorhome, is tempting fate and had better watch their inflation and sidewalls VERY carefully AND have good comprehensive body insurance.