LT245/70R18 in inches

How tall is a LT245 70R18 tire?

When converted to inches, the equivalent of a LT245/70R18 tire size is 31.6x9.6R18. It means that:

  • height overall (or diameter) is 31.6 inches
  • tread width is 9.6 inches
  • wheel diameter is 18 inches

Learn more

LT245/70R18 tire size in inches
LT245/70R18 tire size chart

LT245/70R18 tire size in inches

LT245/70R18 Height / overall diameter: 31.6 inches
Height / overall diameter
31.6 inches
LT245/70R18 Tread width: 9.6 inches
Tread width
9.6 inches
LT245/70R18 Sidewall: 6.8 inches
Sidewall
6.8 inches
LT245/70R18 Wheel diameter: 18 inches
Wheel diameter
18 inches
LT245/70R18 Circumference: 99.2 inches
Circumference
99.2 inches
LT245/70R18 Revolutions: 639 per mile
Revolutions
639 per mile

LT245/70R18 — what does it mean?

  • LT means "light truck"
  • 245 stands for tread width in millimeters
  • 70 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

LT245/70R18 tire code
LT245/70R18 tire code

How to convert LT245 70R18 to inches?

First of all, we need to divide 245 mm (width) by 25.4 (mm to inch conversion), which will give us a width of 9.6″. Then, 70% of the 9.6″ will result in 6.8″ 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 31.6″ total tire diameter (or height).

For your convenience, below is a table for LT245/70R18 conversion to inches:

Inches Metric
Overall diameter (height) 31.6″ 803 mm
Tread width 9.6″ 245 mm
Wheel diameter 18″ 803 mm
Sidewall height 6.8″ 172 mm
Circumference 99.2″ 2521 mm
Revolutions 639 / ml 397 / km

Alternatives to a LT245/70R18 tire

If you're looking to upsize your LT245 70R18 tires, try to stay within 3% deviation of an overall diameter for safety reasons.

Tire Tire diameter Width Wheel Size
275/65R18 32″ 0.31% 10.8″ 18″
LT275/65R18 32″ 0.31% 10.8″ 18″
265/65R18 31.6″ 0% 10.4″ 18″
285/60R18 31.4″ -0.16% 11.2″ 18″
255/70R18 32″ 0.31% 10″ 18″
305/60R18 32.4″ 0.62% 12″ 18″
275/60R18 31″ -0.5% 10.8″ 18″
P255/70R18 32″ 0.31% 10″ 18″
255/65R18 31″ -0.5% 10″ 18″
235/70R18 31″ -0.5% 9.3″ 18″