I used to rotate every year, but I stopped doing it on the trailer I own now.
The purpose of rotating tires is to prolong the tires' life and make them wear evenly if there is uneven wear.
My prior trailers had uneven wear due to poor alignment and low inflation pressure. My present trailer wears each tire evenly, since alignment is good and air pressure is increased to about 55psi, 10psi over suggested 45 psi on the manufacturer's placard.
I always keep an eye on the wear pattern. I change the tires due to age at around 5 years, so they never wear out, just age out.
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Alan
2014 Silverado LTZ 1500 Crew Cab 5.3L maximum trailering package
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