LT325/65R18 in inches

How tall is a LT325 65R18 tire?

When converted to inches, the equivalent of a LT325/65R18 tire size is 34.6x12.8R18. It means that:

  • height overall (or diameter) is 34.6 inches
  • tread width is 12.8 inches
  • wheel diameter is 18 inches

Learn more

LT325/65R18 tire size in inches
LT325/65R18 tire size chart

LT325/65R18 tire size in inches

LT325/65R18 Height / overall diameter: 34.6 inches
Height / overall diameter
34.6 inches
LT325/65R18 Tread width: 12.8 inches
Tread width
12.8 inches
LT325/65R18 Sidewall: 8.3 inches
Sidewall
8.3 inches
LT325/65R18 Wheel diameter: 18 inches
Wheel diameter
18 inches
LT325/65R18 Circumference: 108.6 inches
Circumference
108.6 inches
LT325/65R18 Revolutions: 583 per mile
Revolutions
583 per mile

LT325/65R18 — what does it mean?

  • LT means "light truck"
  • 325 stands for tread width in millimeters
  • 65 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

LT325/65R18 tire code
LT325/65R18 tire code

How to convert LT325 65R18 to inches?

First of all, we need to divide 325 mm (width) by 25.4 (mm to inch conversion), which will give us a width of 12.8″. Then, 65% of the 12.8″ will result in 8.3″ 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 34.6″ total tire diameter (or height).

For your convenience, below is a table for LT325/65R18 conversion to inches:

Inches Metric
Overall diameter (height) 34.6″ 879 mm
Tread width 12.8″ 325 mm
Wheel diameter 18″ 879 mm
Sidewall height 8.3″ 211 mm
Circumference 108.6″ 2760 mm
Revolutions 583 / ml 362 / km

Alternatives to a LT325/65R18 tire

If you're looking to upsize your LT325 65R18 tires, try to stay within 3% deviation of an overall diameter for safety reasons.

Tire Tire diameter Width Wheel Size
325/65R18 34.6″ 0% 12.8″ 18″
285/75R18 34.8″ 0.14% 11.2″ 18″
285/70R18 33.8″ -0.58% 11.2″ 18″
295/70R18 34.2″ -0.29% 11.6″ 18″
305/65R18 33.6″ -0.75% 12″ 18″
LT295/70R18 34.2″ -0.29% 11.6″ 18″
305/70R18 34.8″ 0.14% 12″ 18″
315/70R18 35.4″ 0.56% 12.4″ 18″
275/80R18 35.4″ 0.56% 10.8″ 18″
345/60R18 34.2″ -0.29% 13.6″ 18″