Should I replace OEM tires on my 2021 Tab400 Boondock just due to age?

Simbionic

Tread is fine…..thinking solely about ageing and blowouts. 

Which brand tire is recommended replacement?

tabiphile

It depends..... how is your boondock stored? Has it sat with its full weight on the tires or do you relieve them? What kind of conditions have they been exposed to? High/low temperature extremes can shorten tire life. How many miles do they have on them? 
Are there any sign of checking/drywall damage on the side walls?
It is common to replace tires within 5 years, but you might be told to replace them in 3 to 7 years. 5 seems like a good compromise, presuming proper storage. 

Simbionic

Thank you. Maybe 12,000 miles on them. Sits on gravel, fully inflated, NE Florida elements. 

I will inspect. What is a good replacement? Same as OEM?  Easy to obtain?

pthomas745

Lots of different threads on tires.  Have a look at your tire sizes and match up what  owners discuss in these threads.  

https://www.google.com/search?q=400+tire+replacement+site:tab-rv.vanillacommunity.com&client=firefox-b-1-d&uact=5&oq=400+tire+replacement+site:tab-rv.vanillacommunity.com

Horigan

If there are micro-cracks in the sidewalls, I would definitely replace them.  That's the typical sign of aging.  I put covers on my trailer tires in the offseason to mitigate the UV damage.

NorthIsUp

I finally just replaced my 2019 Tab 400 OEM tires with Goodyear Endurance 225/75R15 tires after talking about it for years here. Like yours tread was fine, but age was probably taking its toll and I didn't want to chance it. Trailer is stored covered outside in dry Nevada climate and the tires didn't showed any signs of cracking or other issues. It was just time.
The original size 235/75R15 were hard to find in a premium trailer tire, hence the 225/75R15 tires. Those Goodyears are a bit expensive, but I expect to get good and safe use out of them. They are made in the USA.

Tabnero

I think just on milage you should replace them. Heat damage from long term use may not be seen. I think many ST tire manufacturers indicate 12,000 miles max limit