How tall is a 275/50R21 tire?

A 275/50R21 has a nominal overall diameter of 31.82 inches (808 mm), calculated as the 21-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 275/50R21 tire fit?

A 275/50R21 fits a wheel of 21 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 275/50R21 mean?

275 is the section width in millimetres. 50 is the aspect ratio — the sidewall is 50% of the width, so 137.5 mm here. R marks the construction (radial). 21 is the wheel diameter in inches.

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Size Dimensions & Specs

Tires Size 275/50R21

Dimensions, specs, and every size 275/50R21 tire currently in stock

Overall Height

31.82"

808 mm · calculated

Section Width

275 mm

10.83 inches

Sidewall Height

5.41"

137.5 mm · 50% profile

Wheel Diameter

21"

533.4 mm

275/50R21 Specifications

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

Specification	Imperial	Metric
Section width	10.83 in	275 mm
Aspect ratio	50%	—
Sidewall height	5.41 in	137.5 mm
Overall diameter (calculated)	31.82 in	808 mm
Wheel / rim diameter	21 in	533.4 mm
Construction	Radial	—

What does 275/50R21 mean?

Reading the code on your sidewall

Section width

275 mm

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

Aspect ratio

50% profile

The sidewall stands 50% of the section width, which is 137.5 mm on this size.

Construction (R)

Radial

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

Wheel diameter

21 in

Fits a wheel measuring 21 inches across.

275/50R21 Questions & Answers

Dimensions and fitment guidelines for size 275/50R21

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