315/30R30 in Inches

Tire size 315/30R30 refers to the tire size in numbers and letters such as the first number “315” indicates the tire width in millimeters, the second number “30” indicates the aspect ratio of the tire and the last number indicates the diameter of the tire. A 315/30R30 tire in inches can be described as a tire with a width of about 12.4 inches, a sidewall height of about 3.7 inches, and it fits on a 30-inch wheel.

Converting 315/30R30 in Inches

Tire Diameter37.5 inches952 mm
Tread Width12.4 inches315 mm
Rim Diameter30 inches762 mm
Sidewall Height3.7 inches95 mm
Circumference117.8 inches2989 mm
Revolutions538 per mile335 per km

Tire Size Calculator

The Tire Size Calculator is a convenient online tool that helps determine the correct tire dimensions for a vehicle, ensuring optimal performance and compatibility.

Tire Diameter
Tread Width
Rim Diameter
Sidewall Height

315/30R30 Alternate Tire Size

Tire Size Overall Diameter Difference
305/25R32 38″ (965 mm) 1.4%

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