37X12.5R15 conversion to metric size

37X12.5R15 tires are 37.0″ tall, have a section width of 12.5″, and fit wheels with a diameter of 15. The circumference is 116.2″ that translates into 545 revolutions per mile. As a rule, they can be mounted on the wheels with 15″ x 8.5-11″ rim width. In the metric system, the equivalent tire size is 318/88/R15.

What is 37X12.5R15 in inches?

Tire Diameter:37.0″
Tire Section Width:12.5″
Rim Width Range:15″ x 8.5-11″
Sidewall Height:11.0″

Alternate sizes – Upsizing Wheels or Tires?

What are 37X12.5R15 close equivalents?

Check out the chart below to find possible alternatives to the 37X12.5R15 tire size staying within the 3%-range of the tire diameter, allowing to choose wider wheels or tires with smaller sidewalls. A good rule of thumb is to avoid decreasing the diameter of the wheel. If you are not sure about the custom sizes, consult the experts or stick to the factory tire size.

Tire sizeDiameterDifferenceWidthWheel size
Upsizing chart

How to decode 37X12.5R15 tire size in metric?

Trying to decode the size of the tires? Scroll down the page to learn what all these numbers on the sidewall stand for.

P or LTThe first letter in the string denotes the class. P stands for passenger vehicles, LT is intended for light trucks carrying heavy loads.
318It means the width of the tire is 318 millimeters
88The tire has an aspect ratio of 88. To put it simple, the sidewall height is 88% of the width, so it would be 11.0″.
RR stands for the Radial, a standard construction method for about 99% of tires.
15The tire is designed to fit 15″ x 8.5-11″ rims that are 15 inches in diameter.

Popular questions about 37X12.5R15 tire size

How wide is a 37X12.5R15 tire?

The tires of the given size have a section width of 12.5″ inches.

How tall is a 37X12.5R15 tire?

The height of the following tire size equals 37.0″ inches.

What rims will fit 37X12.5R15 tires?

For each tire size, often there are several wheel sizes. You can’t put very wide tires on narrow rims or vise versa. You need the rim size of 15″ x 8.5-11″ for 15″ x 8.5-11″ tires.

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