P285/35R18 in inches

How tall is a P285 35R18 tire?

When converted to inches, the equivalent of a P285/35R18 tire size is 25.8x11.2R18. It means that:

  • height overall (or diameter) is 25.8 inches
  • tread width is 11.2 inches
  • wheel diameter is 18 inches

Learn more

P285/35R18 tire size in inches
P285/35R18 tire size chart

P285/35R18 tire size in inches

P285/35R18 Height / overall diameter: 25.8 inches
Height / overall diameter
25.8 inches
P285/35R18 Tread width: 11.2 inches
Tread width
11.2 inches
P285/35R18 Sidewall: 3.9 inches
Sidewall
3.9 inches
P285/35R18 Wheel diameter: 18 inches
Wheel diameter
18 inches
P285/35R18 Circumference: 81 inches
Circumference
81 inches
P285/35R18 Revolutions: 782 per mile
Revolutions
782 per mile

P285/35R18 — what does it mean?

  • P means "passenger car"
  • 285 stands for tread width in millimeters
  • 35 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

P285/35R18 tire code
P285/35R18 tire code

How to convert P285 35R18 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, 35% of the 11.2″ will result in 3.9″ 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 25.8″ total tire diameter (or height).

For your convenience, below is a table for P285/35R18 conversion to inches:

Inches Metric
Overall diameter (height) 25.8″ 655 mm
Tread width 11.2″ 285 mm
Wheel diameter 18″ 655 mm
Sidewall height 3.9″ 100 mm
Circumference 81″ 2057 mm
Revolutions 782 / ml 486 / km

Alternatives to a P285/35R18 tire

If you're looking to upsize your P285 35R18 tires, try to stay within 3% deviation of an overall diameter for safety reasons.

Tire Tire diameter Width Wheel Size
245/40R18 25.8″ 0% 9.6″ 18″
235/45R18 26.4″ 0.6% 9.3″ 18″
135/70R18 25.4″ -0.38% 5.3″ 18″
135/80R18 26.6″ 0.79% 5.3″ 18″
145/65R18 25.4″ -0.38% 5.7″ 18″
145/70R18 26″ 0.19% 5.7″ 18″
155/60R18 25.4″ -0.38% 6.1″ 18″
155/70R18 26.6″ 0.79% 6.1″ 18″
T185/55R18 26″ 0.19% 7.3″ 18″
205/45R18 25.2″ -0.58% 8.1″ 18″