I use tire covers on my car trailer and it seems to help some. Trailer tires seem to start cracking from day one. Rubber quality has went down hill for sure.
Covering your tires so the sun doesn't hit them is one of the best things you can do.
The sun does decay tires.
There really no actual natural rubber in tires anymore, they're made from petroleum by-products these days.
The suns UV rays destroy them, you know just like it does to plastic.
Treating them with something that protects against UV rays will help.
I use a pair of old steel exterior house doors leaned up against my trailer to keep the sun off the tires when it's parked, which is more than it's actually used.
