P155/80R12 in inches

How tall is a P155 80R12 tire?

When converted to inches, the equivalent of a P155/80R12 tire size is 21.8x6.1R12. It means that:

  • height overall (or diameter) is 21.8 inches
  • tread width is 6.1 inches
  • wheel diameter is 12 inches

Learn more

P155/80R12 tire size in inches
P155/80R12 tire size chart

P155/80R12 tire size in inches

P155/80R12 Height / overall diameter: 21.8 inches
Height / overall diameter
21.8 inches
P155/80R12 Tread width: 6.1 inches
Tread width
6.1 inches
P155/80R12 Sidewall: 4.9 inches
4.9 inches
P155/80R12 Wheel diameter: 12 inches
Wheel diameter
12 inches
P155/80R12 Circumference: 68.5 inches
68.5 inches
P155/80R12 Revolutions: 925 per mile
925 per mile

P155/80R12 — what does it mean?

  • P means "passenger car"
  • 155 stands for tread width in millimeters
  • 80 is an aspect ration between the tread width and the sidewall in percents
  • R means that the tire has a radial construction
  • 12 is a wheel diameter (or rim) in inches

P155/80R12 tire code
P155/80R12 tire code

How to convert P155 80R12 to inches?

First of all, we need to divide 155 mm (width) by 25.4 (mm to inch conversion), which will give us a width of 6.1″. Then, 80% of the 6.1″ will result in 4.9″ sidewall.

To get the total height or tire diameter, we need to sum the 12″ rim diameter with two of the sidewall heights. It will result in a 21.8″ total tire diameter (or height).

For your convenience, below is a table for P155/80R12 conversion to inches:

Inches Metric
Overall diameter (height) 21.8″ 554 mm
Tread width 6.1″ 155 mm
Wheel diameter 12″ 554 mm
Sidewall height 4.9″ 124 mm
Circumference 68.5″ 1740 mm
Revolutions 925 / ml 575 / km

Alternatives to a P155/80R12 tire

If you're looking to upsize your P155 80R12 tires, try to stay within 3% deviation of an overall diameter for safety reasons.

Tire Tire diameter Width Wheel Size
155/80R12 21.8″ 0% 6.1″ 12″