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What Does The Letter R Mean On Tires  

Question:

What is does the letter mean that is after the size eg 195/60 R?

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Expert Reply:

The letter R means that the tire has a radial construction.

The tire/wheel combo you referenced, part # AM30100 is an 8 inch bias-ply tire with a load range B on a steel wheel that has a 5 on 4-1/2 wheel bolt pattern. The maximum load on this tire is 715 lbs at 50 psi.

I have attached some helpful articles that explain wheel and tire sizing and what each of the letters and numbers mean you can check out.

expert reply by:
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Jeffrey L

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