How tall is a ST255/85R16 tire?

A ST255/85R16 has a nominal overall diameter of 33.08 inches (840 mm), calculated as the 16-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 ST255/85R16 tire fit?

A ST255/85R16 fits a wheel of 16 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 ST255/85R16 mean?

255 is the section width in millimetres. 85 is the aspect ratio — the sidewall is 85% of the width, so 216.8 mm here. R marks the construction (radial). 16 is the wheel diameter in inches.

Size Dimensions & Specs

Tires Size ST255/85R16

Dimensions, specs, and every size ST255/85R16 tire currently in stock

Overall Height

33.08"

840 mm · calculated

Section Width

255 mm

10.04 inches

Sidewall Height

8.54"

216.8 mm · 85% profile

Wheel Diameter

16"

406.4 mm

ST255/85R16 Specifications

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

Specification	Imperial	Metric
Section width	10.04 in	255 mm
Aspect ratio	85%	—
Sidewall height	8.54 in	216.8 mm
Overall diameter (calculated)	33.08 in	840 mm
Wheel / rim diameter	16 in	406.4 mm
Construction	Radial	—
Service type	Special trailer	—

What does ST255/85R16 mean?

Reading the code on your sidewall

Section width

255 mm

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

Aspect ratio

85% profile

The sidewall stands 85% of the section width, which is 216.8 mm on this size.

Construction (R)

Radial

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

Wheel diameter

16 in

Fits a wheel measuring 16 inches across.

ST255/85R16 Questions & Answers

Dimensions and fitment guidelines for size ST255/85R16

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