How tall is a LT145/80R12 tire?

A LT145/80R12 has a nominal overall diameter of 21.14 inches (537 mm), calculated as the 12-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 LT145/80R12 tire fit?

A LT145/80R12 fits a wheel of 12 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 LT145/80R12 mean?

145 is the section width in millimetres. 80 is the aspect ratio — the sidewall is 80% of the width, so 116 mm here. R marks the construction (radial). 12 is the wheel diameter in inches.

Size Dimensions & Specs

Tires Size LT145/80R12

Dimensions, specs, and every size LT145/80R12 tire currently in stock

Overall Height

21.14"

537 mm · calculated

Section Width

145 mm

5.71 inches

Sidewall Height

4.57"

116 mm · 80% profile

Wheel Diameter

12"

304.8 mm

LT145/80R12 Specifications

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

Specification	Imperial	Metric
Section width	5.71 in	145 mm
Aspect ratio	80%	—
Sidewall height	4.57 in	116 mm
Overall diameter (calculated)	21.14 in	537 mm
Wheel / rim diameter	12 in	304.8 mm
Construction	Radial	—
Service type	Light truck	—

What does LT145/80R12 mean?

Reading the code on your sidewall

Section width

145 mm

The distance from sidewall to sidewall across the tire's widest point.

Aspect ratio

80% profile

The sidewall stands 80% of the section width, which is 116 mm on this size.

Construction (R)

Radial

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

Wheel diameter

12 in

Fits a wheel measuring 12 inches across.

LT145/80R12 Questions & Answers

Dimensions and fitment guidelines for size LT145/80R12

Tires Size LT145/80R12

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LT145/80R12 Specifications

What does LT145/80R12 mean?

145 mm

80% profile

Radial

12 in

LT145/80R12 Questions & Answers

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