A Comparable Tire Size to 31/10.5

by Tim Plaehn
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The 31/10.5 tire size is an older size that gives the nominal tire measurement in inches. The size is commonly written 31x10.50R15; the tires fit on a 15-inch-diameter rim measuring 7 to 9 inches wide.

Identification

The 31x10.50R15 tire size is a light truck size, and the tires---most commonly used on older four-wheel-drive vehicles---have a wide cross section. Tread patterns range from mud and snow radials to extremely aggressive lugs not suitable for on-road driving.

Replacements

The closest metric size to 31x10.50R15 is 265/75R15. This metric size indicates a tire diameter of 30.7 inches and width of 10.5 inches. The standard size of the 31x10.50 is 30.5 inches in diameter and 10.5 inches wide.

Considerations

For replacement tires, the 265/75R15 size will provide more choices for tires with highway or all-season tread patterns. The original 31x10.50R15 size is the choice for finding aggressive off-road tires.

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