ST235/85R16 in inches

How tall is a ST235 85R16 tire?

When converted to inches, the equivalent of a ST235/85R16 tire size is 31.8x9.3R16. It means that:

  • height overall (or diameter) is 31.8 inches
  • tread width is 9.3 inches
  • wheel diameter is 16 inches

Learn more

ST235/85R16 tire size in inches
ST235/85R16 tire size chart

ST235/85R16 tire size in inches

ST235/85R16 Height / overall diameter: 31.8 inches
Height / overall diameter
31.8 inches
ST235/85R16 Tread width: 9.3 inches
Tread width
9.3 inches
ST235/85R16 Sidewall: 7.9 inches
Sidewall
7.9 inches
ST235/85R16 Wheel diameter: 16 inches
Wheel diameter
16 inches
ST235/85R16 Circumference: 99.9 inches
Circumference
99.9 inches
ST235/85R16 Revolutions: 634 per mile
Revolutions
634 per mile

ST235/85R16 — what does it mean?

  • ST means "special trailer"
  • 235 stands for tread width in millimeters
  • 85 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

ST235/85R16 tire code
ST235/85R16 tire code

How to convert ST235 85R16 to inches?

First of all, we need to divide 235 mm (width) by 25.4 (mm to inch conversion), which will give us a width of 9.3″. Then, 85% of the 9.3″ will result in 7.9″ 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 31.8″ total tire diameter (or height).

For your convenience, below is a table for ST235/85R16 conversion to inches:

Inches Metric
Overall diameter (height) 31.8″ 808 mm
Tread width 9.3″ 235 mm
Wheel diameter 16″ 808 mm
Sidewall height 7.9″ 200 mm
Circumference 99.9″ 2537 mm
Revolutions 634 / ml 394 / km

Alternatives to a ST235/85R16 tire

If you're looking to upsize your ST235 85R16 tires, try to stay within 3% deviation of an overall diameter for safety reasons.

Tire Tire diameter Width Wheel Size
265/75R16 31.6″ -0.16% 10.4″ 16″
LT265/75R16 31.6″ -0.16% 10.4″ 16″
275/70R16 31.2″ -0.5% 10.8″ 16″
235/85R16 31.8″ 0% 9.3″ 16″
285/70R16 31.8″ 0% 11.2″ 16″
225/85R16 31″ -0.66% 8.9″ 16″
225/90R16 32″ 0.15% 8.9″ 16″
265/80R16 32.6″ 0.61% 10.4″ 16″
295/65R16 31.2″ -0.5% 11.6″ 16″
345/55R16 31″ -0.66% 13.6″ 16″