When to replace tires

Please post their age from the full DOT number molded into one sidewall of each tire.

Suspect 99% of RV tires will be replaced because the AGE OUT, not WEAR OUT.

also different companies rubber compounds, weather differently
Michelin are know to dry and crack get splits in the sidewall, over the years, before the tread wears

many RVs spend to much time sitting in the sun and not enough miles rolling down the road
its the rolling that keeps the carcass/core soft and flexible instead of dead and dry

info needed
brand, model#, date code

rowekmr wrote:
In my previous experience with cars/trucks I replaced tires when they were worn out or in the case of trailers with little use when they were weather checked (or dry rot).

I got a MH last year with tires (22.5) that seem to have the beginning signs of weather checking (small lines on sidewall) but the mechanic that checked them out said they were okay. Another shop that I had work done to MH said the tires were okay. What are your opinions? Are these types of tires that much more robust than passenger/med truck tires?

Thanks

Well,
Just so we're all educated on just what make/model/size and year of tires you presently have, it will help us help you make an informed decision. You don't mention anything about the "DOT" mfgr date so, I'm not sure you're aware of it. If not, all tires are required to have a manufacture date on them. It's required by the DOT. Now, normally, that number consists of 4 numbers. And, normally, it's in or very near a oval shaped icon on the side wall of each tire. It's not always visible though. I've seen them on only one side of the tire.

But, if you look for it, you'll see something like, an example will be, "3410". What that deciphers as is, the 34th week of 2010. Or, another one would be say, 4117. That tire was made the 41st week of 2017.

So, you need to find those dates on your tires and report back so we can all know what age of tires we're trying to help you with.
Scott

Here is a good technical bulletin from Michelin on RV/Motorhome tires. Don't know your particular information, but most manufactures publish information like this.

https://www.michelintruck.com/assets/pdf/bulletins/TB_Service_Life_RV_Tires.pdf

Safe travels.