P275/45R20 in inches

How tall is a P275 45R20 tire?

When converted to inches, the equivalent of a P275/45R20 tire size is 29.8x10.8R20. It means that:

  • height overall (or diameter) is 29.8 inches
  • tread width is 10.8 inches
  • wheel diameter is 20 inches

Learn more

P275/45R20 tire size in inches
P275/45R20 tire size chart

P275/45R20 tire size in inches

P275/45R20 Height / overall diameter: 29.8 inches
Height / overall diameter
29.8 inches
P275/45R20 Tread width: 10.8 inches
Tread width
10.8 inches
P275/45R20 Sidewall: 4.9 inches
Sidewall
4.9 inches
P275/45R20 Wheel diameter: 20 inches
Wheel diameter
20 inches
P275/45R20 Circumference: 93.6 inches
Circumference
93.6 inches
P275/45R20 Revolutions: 678 per mile
Revolutions
678 per mile

P275/45R20 — what does it mean?

  • P means "passenger car"
  • 275 stands for tread width in millimeters
  • 45 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

P275/45R20 tire code
P275/45R20 tire code

How to convert P275 45R20 to inches?

First of all, we need to divide 275 mm (width) by 25.4 (mm to inch conversion), which will give us a width of 10.8″. Then, 45% of the 10.8″ will result in 4.9″ 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 29.8″ total tire diameter (or height).

For your convenience, below is a table for P275/45R20 conversion to inches:

Inches Metric
Overall diameter (height) 29.8″ 757 mm
Tread width 10.8″ 275 mm
Wheel diameter 20″ 757 mm
Sidewall height 4.9″ 124 mm
Circumference 93.6″ 2377 mm
Revolutions 678 / ml 421 / km

Alternatives to a P275/45R20 tire

If you're looking to upsize your P275 45R20 tires, try to stay within 3% deviation of an overall diameter for safety reasons.

Tire Tire diameter Width Wheel Size
265/50R20 30.4″ 0.49% 10.4″ 20″
295/45R20 30.4″ 0.49% 11.6″ 20″
275/45R20 29.8″ 0% 10.8″ 20″
255/50R20 30″ 0.16% 10″ 20″
295/40R20 29.2″ -0.5% 11.6″ 20″
285/40R20 29″ -0.67% 11.2″ 20″
235/55R20 30.2″ 0.33% 9.3″ 20″
T145/80R20 29.2″ -0.5% 5.7″ 20″
235/50R20 29.2″ -0.5% 9.3″ 20″
245/50R20 29.6″ -0.17% 9.6″ 20″