P225/40R16 in inches

How tall is a P225 40R16 tire?

When converted to inches, the equivalent of a P225/40R16 tire size is 23x8.9R16. It means that:

  • height overall (or diameter) is 23 inches
  • tread width is 8.9 inches
  • wheel diameter is 16 inches

Learn more

P225/40R16 tire size in inches
P225/40R16 tire size chart

P225/40R16 tire size in inches

P225/40R16 Height / overall diameter: 23 inches
Height / overall diameter
23 inches
P225/40R16 Tread width: 8.9 inches
Tread width
8.9 inches
P225/40R16 Sidewall: 3.5 inches
Sidewall
3.5 inches
P225/40R16 Wheel diameter: 16 inches
Wheel diameter
16 inches
P225/40R16 Circumference: 72.2 inches
Circumference
72.2 inches
P225/40R16 Revolutions: 877 per mile
Revolutions
877 per mile

P225/40R16 — what does it mean?

  • P means "passenger car"
  • 225 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
  • 16 is a wheel diameter (or rim) in inches

P225/40R16 tire code
P225/40R16 tire code

How to convert P225 40R16 to inches?

First of all, we need to divide 225 mm (width) by 25.4 (mm to inch conversion), which will give us a width of 8.9″. Then, 40% of the 8.9″ will result in 3.5″ sidewall.

To get the total height or tire diameter, we need to sum the 16″ rim diameter with two of the sidewall heights. It will result in a 23″ total tire diameter (or height).

For your convenience, below is a table for P225/40R16 conversion to inches:

Inches Metric
Overall diameter (height) 23″ 584 mm
Tread width 8.9″ 225 mm
Wheel diameter 16″ 584 mm
Sidewall height 3.5″ 90 mm
Circumference 72.2″ 1834 mm
Revolutions 877 / ml 545 / km

Alternatives to a P225/40R16 tire

If you're looking to upsize your P225 40R16 tires, try to stay within 3% deviation of an overall diameter for safety reasons.

Tire Tire diameter Width Wheel Size
115/70R16 22.4″ -0.65% 4.5″ 16″
125/70R16 23″ 0% 4.9″ 16″
135/60R16 22.4″ -0.65% 5.3″ 16″
135/70R16 23.4″ 0.42% 5.3″ 16″
165/50R16 22.6″ -0.43% 6.5″ 16″
175/50R16 23″ 0% 6.9″ 16″
175/55R16 23.6″ 0.63% 6.9″ 16″
185/50R16 23.4″ 0.42% 7.3″ 16″
195/45R16 23″ 0% 7.7″ 16″
195/50R16 23.8″ 0.88% 7.7″ 16″