P345/55R15 in inches

How tall is a P345 55R15 tire?

When converted to inches, the equivalent of a P345/55R15 tire size is 30x13.6R15. It means that:

  • height overall (or diameter) is 30 inches
  • tread width is 13.6 inches
  • wheel diameter is 15 inches

Learn more

P345/55R15 tire size in inches
P345/55R15 tire size chart

P345/55R15 tire size in inches

P345/55R15 Height / overall diameter: 30 inches
Height / overall diameter
30 inches
P345/55R15 Tread width: 13.6 inches
Tread width
13.6 inches
P345/55R15 Sidewall: 7.5 inches
Sidewall
7.5 inches
P345/55R15 Wheel diameter: 15 inches
Wheel diameter
15 inches
P345/55R15 Circumference: 94.2 inches
Circumference
94.2 inches
P345/55R15 Revolutions: 673 per mile
Revolutions
673 per mile

P345/55R15 — what does it mean?

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

P345/55R15 tire code
P345/55R15 tire code

How to convert P345 55R15 to inches?

First of all, we need to divide 345 mm (width) by 25.4 (mm to inch conversion), which will give us a width of 13.6″. Then, 55% of the 13.6″ will result in 7.5″ sidewall.

To get the total height or tire diameter, we need to sum the 15″ rim diameter with two of the sidewall heights. It will result in a 30″ total tire diameter (or height).

For your convenience, below is a table for P345/55R15 conversion to inches:

Inches Metric
Overall diameter (height) 30″ 762 mm
Tread width 13.6″ 345 mm
Wheel diameter 15″ 762 mm
Sidewall height 7.5″ 190 mm
Circumference 94.2″ 2393 mm
Revolutions 673 / ml 418 / km

Alternatives to a P345/55R15 tire

If you're looking to upsize your P345 55R15 tires, try to stay within 3% deviation of an overall diameter for safety reasons.

Tire Tire diameter Width Wheel Size
265/75R15 30.6″ 0.49% 10.4″ 15″
265/70R15 29.6″ -0.33% 10.4″ 15″
255/75R15 30″ 0% 10″ 15″
245/75R15 29.4″ -0.5% 9.6″ 15″
205/90R15 29.6″ -0.33% 8.1″ 15″
215/85R15 29.4″ -0.5% 8.5″ 15″
225/80R15 29.2″ -0.66% 8.9″ 15″
235/80R15 29.8″ -0.16% 9.3″ 15″
275/70R15 30.2″ 0.16% 10.8″ 15″
285/70R15 30.8″ 0.65% 11.2″ 15″