285/25R22 in inches

A 285/25R22 tire is 27.6″ tall and 11.2″ wide, and fits a 22″ wheel. In inches it is written 27.6×11.2R22.

Diameter27.61″

Width11.22″

Sidewall2.81″

Drawn to scale. Nominal dimensions calculated from the size code.

Manufacturer data

How tall 285/25R22 tires really are

Heights published by Michelin for the one tire in this size. Their published revolutions per mile work out to 26.7″ under load (below).

The one tire listed, the Michelin Pilot Sport 4 S, measures 27.60″: 0.01″ shorter than the size code's 27.61″.

Height under load26.7″

Published revs per mile (754) mean the tire rolls like a 26.7″ tire on the vehicle. Use this for speedometer calibration.

1 tire in 285/25R22

Sort by the spec you care about.

	Load					Revs/mi	Source
Michelin Pilot Sport 4 SPerformance	XL · 95(Y)	27.60	28.3	9.5	1,521	754	Spec page

Is 285/25R22 a 28-inch tire?

≈28″

Close. The size code works out to 27.61″, and the 1 tire here publishes 27.60″, so people call it a 28.

All 28-inch tire sizes, on every wheel size.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

Size	Diameter ″	vs 285/25R22	Difference
265/30R21	27.26	-0.35″	-1.3%
325/25R21	27.40	-0.21″	-0.8%
275/30R21	27.50	-0.11″	-0.4%
285/30R21	27.73	+0.12″	+0.4%
245/35R21	27.75	+0.14″	+0.5%
345/25R21	27.79	+0.18″	+0.7%
295/25R22	27.81	+0.20″	+0.7%
255/30R22	28.02	+0.41″	+1.5%
265/30R22	28.26	+0.65″	+2.4%
335/25R22	28.59	+0.98″	+3.6%

How to read 285/25R22

How to read any tire size

How 285/25R22 95Y is printed on the sidewall. It's the most common code among the 1 tire here; tires in this size come in other load and speed ratings too.

1285Section width

285 mm across the widest point, or 11.22 inches. Every 285 size

225Aspect ratio

A percentage, not a measurement: the sidewall is 25% as tall as the tire is wide, which is 71.3 mm or 2.81 inches.

3RConstruction

Radial construction.

422Wheel diameter

Mounts on a 22-inch wheel. Approved wheel widths run 10.5″ to 10.5″.

595Load index

Each tire carries up to 1,521 lb (690 kg) at its maximum pressure.

6YSpeed rating

Rated for up to 186 mph sustained.

XLExtra load

Printed after the size.

Specification	Inches	Metric
Overall diameter	27.61	701 mm
Section width	11.22	285 mm
Sidewall height	2.81	71.3 mm
Circumference	86.7	2,203 mm
Revolutions per mile (calculated, unloaded)	730.5	454 per km
Revolutions per mile (published by manufacturers)	754	469 per km
Approved wheel width	10.5	267 mm

Speedometer error after switching to 285/25R22

Your actual speed– mph

Questions about 285/25R22

What is 285/25R22 in inches?

27.61 inches tall, 11.22 inches wide, on a 22-inch wheel. Written in inches, that is roughly 27.6×11.2R22.

What wheel width do I need for 285/25R22?

Manufacturers approve 10.5″ wide wheels for this size.

How many revolutions per mile does a 285/25R22 make?

Published figures run 754 revolutions per mile. The calculated figure is 730.5, but manufacturers measure the tire under load, where it rolls on a smaller radius.