175/55R20 in inches

How tall is a 175 55R20 tire?

When converted to inches, the equivalent of a 175/55R20 tire size is 27.6x6.9R20. It means that:

  • height overall (or diameter) is 27.6 inches
  • tread width is 6.9 inches
  • wheel diameter is 20 inches

Learn more

175/55R20 tire size in inches
175/55R20 tire size chart

175/55R20 tire size in inches

175/55R20 Height / overall diameter: 27.6 inches
Height / overall diameter
27.6 inches
175/55R20 Tread width: 6.9 inches
Tread width
6.9 inches
175/55R20 Sidewall: 3.8 inches
Sidewall
3.8 inches
175/55R20 Wheel diameter: 20 inches
Wheel diameter
20 inches
175/55R20 Circumference: 86.7 inches
Circumference
86.7 inches
175/55R20 Revolutions: 731 per mile
Revolutions
731 per mile

175/55R20 — what does it mean?

  • 175 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
  • 20 is a wheel diameter (or rim) in inches

175/55R20 tire code
175/55R20 tire code

How to convert 175 55R20 to inches?

First of all, we need to divide 175 mm (width) by 25.4 (mm to inch conversion), which will give us a width of 6.9″. Then, 55% of the 6.9″ will result in 3.8″ 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 27.6″ total tire diameter (or height).

For your convenience, below is a table for 175/55R20 conversion to inches:

Inches Metric
Overall diameter (height) 27.6″ 701 mm
Tread width 6.9″ 175 mm
Wheel diameter 20″ 701 mm
Sidewall height 3.8″ 96 mm
Circumference 86.7″ 2201 mm
Revolutions 731 / ml 454 / km

Alternatives to a 175/55R20 tire

If you're looking to upsize your 175 55R20 tires, try to stay within 3% deviation of an overall diameter for safety reasons.

Tire Tire diameter Width Wheel Size
305/35R20 28.4″ 0.7% 12″ 20″
255/35R20 27″ -0.54% 10″ 20″
245/40R20 27.8″ 0.18% 9.6″ 20″
295/35R20 28.2″ 0.53% 11.6″ 20″
285/35R20 27.8″ 0.18% 11.2″ 20″
275/35R20 27.6″ 0% 10.8″ 20″
145/65R20 27.4″ -0.18% 5.7″ 20″
T165/60R20 27.8″ 0.18% 6.5″ 20″
165/60R20 27.8″ 0.18% 6.5″ 20″
195/50R20 27.8″ 0.18% 7.7″ 20″