42X15R15 conversion to metric size

42X15R15 tires are 42.0″ tall, have a section width of 15.0″, and fit wheels with a diameter of 15. The circumference is 131.9″ that translates into 480 revolutions per mile. As a rule, they can be mounted on the wheels with 15″ rim width. In the metric system, the equivalent tire size is 381/90/R15.

What is 42X15R15 in inches?

Tire Diameter:42.0″
Tire Section Width:15.0″
Rim Width Range:15″
Sidewall Height:13.5″
Circumference:131.9″
Revs/Mile:480

Alternate sizes – Upsizing Wheels or Tires?

What are 42X15R15 close equivalents?

Check out the chart below to find possible alternatives to the 42X15R15 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
356/96/R1542.0″0%14.0″15
343/102/R1542.5″1.19%13.5″15
Upsizing chart

How to decode 42X15R15 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.
381It means the width of the tire is 381 millimeters
90The tire has an aspect ratio of 90. To put it simple, the sidewall height is 90% of the width, so it would be 13.5″.
RR stands for the Radial, a standard construction method for about 99% of tires.
15The tire is designed to fit 15″ rims that are 15 inches in diameter.

Popular questions about 42X15R15 tire size

How wide is a 42X15R15 tire?

The tires of the given size have a section width of 15.0″ inches.

How tall is a 42X15R15 tire?

The height of the following tire size equals 42.0″ inches.

What rims will fit 42X15R15 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″ for 15″ tires.

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