275/60R18 in inches

How tall is a 275 60R18 tire?

When converted to inches, the equivalent of a 275/60R18 tire size is 31x10.8R18. It means that:

  • height overall (or diameter) is 31 inches
  • tread width is 10.8 inches
  • wheel diameter is 18 inches

Learn more

275/60R18 tire size in inches
275/60R18 tire size chart

275/60R18 tire size in inches

275/60R18 Height / overall diameter: 31 inches
Height / overall diameter
31 inches
275/60R18 Tread width: 10.8 inches
Tread width
10.8 inches
275/60R18 Sidewall: 6.5 inches
Sidewall
6.5 inches
275/60R18 Wheel diameter: 18 inches
Wheel diameter
18 inches
275/60R18 Circumference: 97.3 inches
Circumference
97.3 inches
275/60R18 Revolutions: 652 per mile
Revolutions
652 per mile

275/60R18 — what does it mean?

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

275/60R18 tire code
275/60R18 tire code

How to convert 275 60R18 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, 60% of the 10.8″ will result in 6.5″ sidewall.

To get the total height or tire diameter, we need to sum the 18″ rim diameter with two of the sidewall heights. It will result in a 31″ total tire diameter (or height).

For your convenience, below is a table for 275/60R18 conversion to inches:

Inches Metric
Overall diameter (height) 31″ 787 mm
Tread width 10.8″ 275 mm
Wheel diameter 18″ 787 mm
Sidewall height 6.5″ 165 mm
Circumference 97.3″ 2471 mm
Revolutions 652 / ml 405 / km

Alternatives to a 275/60R18 tire

If you're looking to upsize your 275 60R18 tires, try to stay within 3% deviation of an overall diameter for safety reasons.

Tire Tire diameter Width Wheel Size
265/65R18 31.6″ 0.5% 10.4″ 18″
285/60R18 31.4″ 0.35% 11.2″ 18″
265/60R18 30.6″ -0.32% 10.4″ 18″
255/65R18 31″ 0% 10″ 18″
285/55R18 30.4″ -0.48% 11.2″ 18″
175/90R18 30.4″ -0.48% 6.9″ 18″
225/75R18 31.4″ 0.35% 8.9″ 18″
235/70R18 31″ 0% 9.3″ 18″
235/75R18 31.8″ 0.66% 9.3″ 18″
245/65R18 30.6″ -0.32% 9.6″ 18″