285/30R24 in inches

285/30R24 — what does it mean?

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

How to convert 285 30R24 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, 30% of the 11.2″ will result in 3.4″ sidewall.

To get the total height or tire diameter, we need to sum the 24″ rim diameter with two of the sidewall heights. It will result in a 30.8″ total tire diameter (or height).

For your convenience, below is a table for 285/30R24 conversion to inches:

Alternatives to a 285/30R24 tire

If you're looking to upsize your 285 30R24 tires, try to stay within 3% deviation of an overall diameter for safety reasons.