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What is the Air Pressure Rating for a 4.80-12 Load Range C Trailer Tire

Question:

4.80-12 Boat Trailer Tires Load Range C 6 ply Is this tire suppose to be inflated to 90 psi it just seems high. Thanks

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Expert Reply:

Trailer tires should always be inflated to the maximum psi indicated on the tire. For a 4.80-12 load range C such as # AM10062, it should be inflated to 90 psi.

The reason you inflate trailer tires to the maximum psi is because trailer tires are constructed with a thicker sidewall to handle more vertical load compared to passenger vehicle tires.

If under inflated the thicker sidewall will lead to excessive heat build up and tire failure. I have included a link to our help article on trailer tires for you.

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Follow up Questions


Mike
Why is it called a 6 ply tire when it says 2 ply side wall and 2ply tread
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