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Originally Posted by prndl
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Those are good diagrams & pics, but they don't apply to trailer tires. There is no steering wheels on a trailer. Trailer tires are subject to extreme lateral forces in sharp turns, known as scrubbing. On your next hard left turn, stick your head out your window and look at the contorted tires. It may look like they are going to pop off the rims! It's normal. It's what the OPs tire wear picture is demonstrating on the tire shoulders. Trailer tires should be kept at the maximum tire pressure, which is typically 110psi for these size rigs. It will help minimize scrubbing and keep the tires at a consistent temperature. There is no need to adjust tire pressure based on the different weights on each tire. Rotate the trailer tires regularly to help minimize scrubbing.