285/40R23 in inches

How tall is a 285 40R23 tire?

When converted to inches, the equivalent of a 285/40R23 tire size is 32x11.2R23. It means that:

  • height overall (or diameter) is 32 inches
  • tread width is 11.2 inches
  • wheel diameter is 23 inches

Learn more

285/40R23 tire size in inches
285/40R23 tire size chart

285/40R23 tire size in inches

285/40R23 Height / overall diameter: 32 inches
Height / overall diameter
32 inches
285/40R23 Tread width: 11.2 inches
Tread width
11.2 inches
285/40R23 Sidewall: 4.5 inches
Sidewall
4.5 inches
285/40R23 Wheel diameter: 23 inches
Wheel diameter
23 inches
285/40R23 Circumference: 100.5 inches
Circumference
100.5 inches
285/40R23 Revolutions: 631 per mile
Revolutions
631 per mile

285/40R23 — what does it mean?

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

285/40R23 tire code
285/40R23 tire code

How to convert 285 40R23 to inches?

First of all, we need to divide 285 mm (width) by 25.4 (mm to inch conversion), which will give us a width of 11.2″. Then, 40% of the 11.2″ will result in 4.5″ sidewall.

To get the total height or tire diameter, we need to sum the 23″ rim diameter with two of the sidewall heights. It will result in a 32″ total tire diameter (or height).

For your convenience, below is a table for 285/40R23 conversion to inches:

Inches Metric
Overall diameter (height) 32″ 813 mm
Tread width 11.2″ 285 mm
Wheel diameter 23″ 813 mm
Sidewall height 4.5″ 114 mm
Circumference 100.5″ 2553 mm
Revolutions 631 / ml 392 / km

Alternatives to a 285/40R23 tire

If you're looking to upsize your 285 40R23 tires, try to stay within 3% deviation of an overall diameter for safety reasons.

Tire Tire diameter Width Wheel Size
275/40R23 31.6″ -0.31% 10.8″ 23″
295/35R23 31.2″ -0.65% 11.6″ 23″
305/35R23 31.4″ -0.47% 12″ 23″
305/40R23 32.6″ 0.46% 12″ 23″
325/35R23 32″ 0% 12.8″ 23″
P305/40R23 32.6″ 0.46% 12″ 23″