315/70R20 in inches

How tall is a 315 70R20 tire?

When converted to inches, the equivalent of a 315/70R20 tire size is 37.4x12.4R20. It means that:

  • height overall (or diameter) is 37.4 inches
  • tread width is 12.4 inches
  • wheel diameter is 20 inches

Learn more

315/70R20 tire size in inches
315/70R20 tire size chart

315/70R20 tire size in inches

315/70R20 Height / overall diameter: 37.4 inches
Height / overall diameter
37.4 inches
315/70R20 Tread width: 12.4 inches
Tread width
12.4 inches
315/70R20 Sidewall: 8.7 inches
8.7 inches
315/70R20 Wheel diameter: 20 inches
Wheel diameter
20 inches
315/70R20 Circumference: 117.4 inches
117.4 inches
315/70R20 Revolutions: 539 per mile
539 per mile

315/70R20 — what does it mean?

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

315/70R20 tire code
315/70R20 tire code

How to convert 315 70R20 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, 70% of the 12.4″ will result in 8.7″ sidewall.

To get the total height or tire diameter, we need to sum the 20″ 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 315/70R20 conversion to inches:

Inches Metric
Overall diameter (height) 37.4″ 950 mm
Tread width 12.4″ 315 mm
Wheel diameter 20″ 950 mm
Sidewall height 8.7″ 221 mm
Circumference 117.4″ 2983 mm
Revolutions 539 / ml 335 / km

Alternatives to a 315/70R20 tire

If you're looking to upsize your 315 70R20 tires, try to stay within 3% deviation of an overall diameter for safety reasons.

Tire Tire diameter Width Wheel Size
355/60R20 36.8″ -0.4% 14″ 20″
LT315/70R20 37.4″ 0% 12.4″ 20″
LT355/60R20 36.8″ -0.4% 14″ 20″