How tall is a 285/650R18 tire?

A 285/650R18 has a nominal overall diameter of 163.86 inches (4162 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 285/650R18 tire fit?

A 285/650R18 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 285/650R18 mean?

285 is the section width in millimetres. 650 is the aspect ratio — the sidewall is 650% of the width, so 1852.5 mm here. R marks the construction (radial). 18 is the wheel diameter in inches.

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Size Dimensions & Specs

Tires Size 285/650R18

Dimensions, specs, and every size 285/650R18 tire currently in stock

Overall Height

163.86"

4162 mm · calculated

Section Width

285 mm

11.22 inches

Sidewall Height

72.93"

1852.5 mm · 650% profile

Wheel Diameter

18"

457.2 mm

285/650R18 Specifications

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

Specification	Imperial	Metric
Section width	11.22 in	285 mm
Aspect ratio	650%	—
Sidewall height	72.93 in	1852.5 mm
Overall diameter (calculated)	163.86 in	4162 mm
Wheel / rim diameter	18 in	457.2 mm
Construction	Radial	—

What does 285/650R18 mean?

Reading the code on your sidewall

Section width

285 mm

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

Aspect ratio

650% profile

The sidewall stands 650% of the section width, which is 1852.5 mm on this 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.

285/650R18 Questions & Answers

Dimensions and fitment guidelines for size 285/650R18

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