RV Tires/Sidewall Cracks

[Chapo]

I've got a 2007 travel trailer that has not been used much and is always stored inside during the winter. I haven't exceeded air pressure at all but am starting to see several smaller cracks on the sidewall of the tires. It hasn't been out in the sunlight all that much but am wondering what else could cause this or what is the likelihood of having a sidewall blow out in the near future. The tread on the tires is around 85%.

Thanks for any advice.

[Jeremy airjer W]

There is a DOT marking on the tire. Usually something like "HJ3K PRJL 3207" The last set of numbers is the manufacture date. In this case the thirty second week of 2007. It is possible that the tires are a lot older than the RV. I would be curious to see when they are made.

[Chapo]

The DOT number was 2306 so slightly older than the trailer. These were the original tires on the trailer when new.