How tall is a 38x15.50R18LT tire?

A 38x15.50R18LT has a nominal overall diameter of 38 inches (965 mm), calculated as the 18-inch wheel plus two sidewalls. This is the unloaded figure — a fitted tire sits fractionally shorter under the weight of the vehicle.

What wheel size does a 38x15.50R18LT tire fit?

A 38x15.50R18LT fits a wheel of 18 inches in diameter. The wheel also has to be within the rim width range the manufacturer publishes for this size, which is printed in the tire's spec sheet.

What do the numbers in 38x15.50R18LT mean?

This is a flotation size, quoted in inches rather than millimetres. 38 is the overall diameter, 15.5 is the section width, R marks the construction (radial), and 18 is the wheel diameter.

Size Dimensions & Specs

Tires Size 38x15.50R18LT

Dimensions, specs, and every size 38x15.50R18LT tire currently in stock

Overall Height

38"

965 mm · calculated

Section Width

15.5"

stated in inches

Sidewall Height

10"

254 mm

Wheel Diameter

18"

457.2 mm

38x15.50R18LT Specifications

Read directly from the size code. Load index, speed rating, and rim width range vary by model.

Specification	Imperial	Metric
Section width	15.5 in	—
Sidewall height	10 in	254 mm
Overall diameter (calculated)	38 in	965 mm
Wheel / rim diameter	18 in	457.2 mm
Construction	Radial	—

What does 38x15.50R18LT mean?

Reading the code on your sidewall

Overall diameter

38 in

Flotation sizes lead with the tire's full height in inches rather than a width in millimetres.

Section width

15.5 in

The width across the widest point of the tire, also quoted in inches on this style of size.

Construction (R)

Radial

The body plies run across the tire at right angles to the direction of travel.

Wheel diameter

18 in

Fits a wheel measuring 18 inches across.

38x15.50R18LT Questions & Answers

Dimensions and fitment guidelines for size 38x15.50R18LT