285/35R22 in inches

A 285/35R22 tire is 29.9″ tall and 11.2″ wide, and fits a 22″ wheel. In inches it is written 29.9×11.2R22.

Diameter29.85″

Width11.22″

Sidewall3.93″

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

Manufacturer data

How tall 285/35R22 tires really are

Heights published by Michelin and Toyo for all 5 tires in this size. Their published revolutions per mile work out to 29.0″ under load (below).

Real 285/35R22 tires measure 29.88–29.90″, against 29.85″ from the size code. Every one runs taller than the size code.

Height under load29.0″

Published revs per mile (695–696) mean the tire rolls like a 29.0″ tire on the vehicle. Use this for speedometer calibration.

Weight spread31.2–37.5 lb

The lightest (Michelin Pilot Sport 4 S, XL) is 6.3 lb lighter per corner than the heaviest (Toyo Proxes ST III, XL).

5 tires in 285/35R22

Sort by the spec you care about.

	Load					Revs/mi	Source
Michelin Pilot Sport 4 SPerformance	XL · 106(Y)	29.90	31.2	9.5	2,094	696	Spec page
Michelin Pilot Sport 4 SPerformance	XL · 106(Y)	29.90	31.8	9.0	2,094	696	Spec page
Michelin Pilot Sport All-Season 4Performance	XL · 106Y	29.90	32.4	10.0	2,094	696	Spec page
Toyo Proxes Sport 2Performance	XL · 106(Y)	29.90	34.2	9.2	2,094	695	Spec page
Toyo Proxes ST IIIPerformance	XL · 106W	29.88	37.5	10.1	2,094	695	Spec page

Is 285/35R22 a 30-inch tire?

≈30″

Yes. The size code works out to 29.85″, and the 5 tires here publish 29.88–29.90″, so people call it a 30.

All 30-inch tire sizes, on every wheel size.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

Size	Diameter ″	vs 285/35R22	Difference
255/35R22	29.03	-0.83″	-2.8%
305/30R22	29.20	-0.65″	-2.2%
265/35R22	29.30	-0.55″	-1.8%
315/30R22	29.44	-0.41″	-1.4%
275/35R22	29.58	-0.28″	-0.9%
255/40R22	30.03	+0.18″	+0.6%
295/35R22	30.13	+0.28″	+0.9%
265/40R22	30.35	+0.49″	+1.6%
305/35R22	30.41	+0.55″	+1.8%
275/40R22	30.66	+0.81″	+2.7%

How to read 285/35R22

How to read any tire size

How 285/35R22 106Y is printed on the sidewall. It's the most common code among the 5 tires here (3 of them); 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

235Aspect ratio

A percentage, not a measurement: the sidewall is 35% as tall as the tire is wide, which is 99.8 mm or 3.93 inches.

3RConstruction

Radial construction.

422Wheel diameter

Mounts on a 22-inch wheel. Approved wheel widths run 9.5″ to 11.0″.

5106Load index

Each tire carries up to 2,094 lb (950 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	29.85	758 mm
Section width	11.22	285 mm
Sidewall height	3.93	99.8 mm
Circumference	93.8	2,382 mm
Revolutions per mile (calculated, unloaded)	675.6	420 per km
Revolutions per mile (published by manufacturers)	695–696	432 per km
Approved wheel width	9.5–11.0	241–279 mm

Speedometer error after switching to 285/35R22

Your actual speed– mph

Questions about 285/35R22

What is 285/35R22 in inches?

29.85 inches tall, 11.22 inches wide, on a 22-inch wheel. Written in inches, that is roughly 29.9×11.2R22.

How much does a 285/35R22 tire weigh?

Between 31.2 lb and 37.5 lb for the 5 tires listed here. The lightest is the Michelin Pilot Sport 4 S (XL); the heaviest is the Toyo Proxes ST III (XL).

What wheel width do I need for 285/35R22?

Manufacturers approve 9.5–11.0″ wide wheels for this size.

How many revolutions per mile does a 285/35R22 make?

Published figures run 695–696 revolutions per mile. The calculated figure is 675.6, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 285/35R22 than 275/35R22?

0.28 inches taller on paper (29.85″ vs 29.58″), which raises the axle about 0.14″. Your speedometer will read about 0.9% slow.