315/30R30 in inches

How tall is a 315 30R30 tire?

When converted to inches, the equivalent of a 315/30R30 tire size is 37.4x12.4R30. It means that:

  • height overall (or diameter) is 37.4 inches
  • tread width is 12.4 inches
  • wheel diameter is 30 inches

Learn more

315/30R30 tire size in inches
315/30R30 tire size chart

315/30R30 tire size in inches

315/30R30 Height / overall diameter: 37.4 inches
Height / overall diameter
37.4 inches
315/30R30 Tread width: 12.4 inches
Tread width
12.4 inches
315/30R30 Sidewall: 3.7 inches
3.7 inches
315/30R30 Wheel diameter: 30 inches
Wheel diameter
30 inches
315/30R30 Circumference: 117.4 inches
117.4 inches
315/30R30 Revolutions: 539 per mile
539 per mile

315/30R30 — what does it mean?

  • 315 stands for tread width in millimeters
  • 30 is an aspect ration between the tread width and the sidewall in percents
  • R means that the tire has a radial construction
  • 30 is a wheel diameter (or rim) in inches

315/30R30 tire code
315/30R30 tire code

How to convert 315 30R30 to inches?

First of all, we need to divide 315 mm (width) by 25.4 (mm to inch conversion), which will give us a width of 12.4″. Then, 30% of the 12.4″ will result in 3.7″ sidewall.

To get the total height or tire diameter, we need to sum the 30″ rim diameter with two of the sidewall heights. It will result in a 37.4″ total tire diameter (or height).

For your convenience, below is a table for 315/30R30 conversion to inches:

Inches Metric
Overall diameter (height) 37.4″ 950 mm
Tread width 12.4″ 315 mm
Wheel diameter 30″ 950 mm
Sidewall height 3.7″ 95 mm
Circumference 117.4″ 2983 mm
Revolutions 539 / ml 335 / km

Alternatives to a 315/30R30 tire

If you're looking to upsize your 315 30R30 tires, try to stay within 3% deviation of an overall diameter for safety reasons.

Tire Tire diameter Width Wheel Size