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285/55R22 in inches

A 285/55R22 tire is 34.3″ tall and 11.2″ wide, and fits a 22″ wheel. In inches it is written 34.3×11.2R22.

Diameter34.34″
Width11.22″
Sidewall6.17″
285/55R22 drawn to scale: 34.34 inch diameter, 6.17 inch sidewall, 22 inch wheel, 11.22 inch tread width22″ wheel6.17″34.34″ overall11.22″ wideSide view
Drawn to scale. Nominal dimensions calculated from the size code.
Manufacturer data

How tall 285/55R22 tires really are

Heights published by BFGoodrich, Mickey Thompson and Toyo for all 6 tires in this size. Their published revolutions per mile work out to 33.3–33.4″ under load (below).

Real 285/55R22 tires measure 34.37–34.60″, against 34.34″ from the size code. Every one runs taller than the size code.

  1. Mickey Thompson Baja Boss A/T34.60″ +0.26″
  2. BFGoodrich All-Terrain T/A KO334.40″ +0.06″
  3. Toyo Open Country A/T III EV34.40″ +0.06″
  4. Toyo Open Country R/T Pro34.40″ +0.06″
  5. Toyo Open Country A/T III34.37″ +0.03″
  6. Toyo Open Country R/T Trail34.37″ +0.03″
Each bar runs from the size code's 34.34″ (the orange line) to the model's published height. The track spans 1.0″. Where a model comes in several load ranges, the darker part shows its range of heights; the number after the name is how many versions it comes in.
Height under load33.3–33.4″

Published revs per mile (604–605) mean the tire rolls like a 33.3–33.4″ tire on the vehicle. Use this for speedometer calibration.

Weight spread61.5–68.0 lb

The lightest (Toyo Open Country A/T III EV, LT E) is 6.5 lb lighter per corner than the heaviest (Mickey Thompson Baja Boss A/T, LT E).

6 tires in 285/55R22

Sort by the spec you care about.

LoadRevs/miSource
Toyo Open Country A/T III EVAll-terrainLT E · 124/121S34.4061.516.53,525604Spec page
Toyo Open Country A/T IIIAll-terrainLT E · 124/121S34.3762.816.53,525604Spec page
Toyo Open Country R/T TrailRugged-terrainLT E · 124/121Q34.3763.116.53,525604Spec page
BFGoodrich All-Terrain T/A KO3All-terrainLT E · 124S34.4065.716.03,525605Spec page
Toyo Open Country R/T ProRugged-terrainLT E · 124/121Q34.4066.617.13,525604Spec page
Mickey Thompson Baja Boss A/TAll-terrainLT E · 124Q34.6068.018.53,525–Spec page

Is 285/55R22 a 34-inch tire?

≈34″

Close. The size code works out to 34.34″, and the 6 tires here publish 34.37–34.60″, so people call it a 34.

All 34-inch tire sizes, on every wheel size.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

SizeDiameter ″vs 285/55R22Difference
295/50R2233.61-0.73″-2.1%
305/50R2234.01-0.33″-1.0%
265/60R2234.52+0.18″+0.5%
295/55R2234.78+0.43″+1.3%
325/50R2234.80+0.45″+1.3%
275/60R2234.99+0.65″+1.9%
35×12.50R2235.00+0.66″+1.9%
35×15.50R2235.00+0.66″+1.9%
305/55R2235.21+0.87″+2.5%
375/45R2235.29+0.94″+2.8%

How to read 285/55R22

How to read any tire size

LT285/55R22 124/121S as printed on the tire sidewall, with each part numberedLT285/55R22 124/121S1234567
How LT285/55R22 124/121S is printed on the sidewall. It's the most common code among the 6 tires here (2 of them); tires in this size come in other load and speed ratings too.
1LTLight truck

Marks a light truck (LT) tire.

2285Section width

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

355Aspect ratio

A percentage, not a measurement: the sidewall is 55% as tall as the tire is wide, which is 156.8 mm or 6.17 inches.

4RConstruction

Radial construction.

522Wheel diameter

Mounts on a 22-inch wheel. Approved wheel widths run 8.0″ to 10.0″.

6124/121Load index

Each tire carries up to 3,525 lb (1,600 kg) on its own, or 3,195 lb (1,450 kg) each when paired on a dual rear axle.

7SSpeed rating

Rated for up to 112 mph sustained.

ELoad range

Printed separately as "LOAD RANGE E": a 10-ply rating, inflated up to 80 psi (standard load-range table). The load range E tires here carry up to 3,525 lb each, as published.

SpecificationInchesMetric
Overall diameter34.34872 mm
Section width11.22285 mm
Sidewall height6.17156.8 mm
Circumference107.92,740 mm
Revolutions per mile (calculated, unloaded)587.3365 per km
Revolutions per mile (published by manufacturers)604–605375–376 per km
Approved wheel width8.0–10.0203–254 mm

Speedometer error after switching to 285/55R22

Your actual speed– mph

Questions about 285/55R22

What is 285/55R22 in inches?

34.34 inches tall, 11.22 inches wide, on a 22-inch wheel. Written in inches, that is roughly 34.3×11.2R22.

How much does a 285/55R22 tire weigh?

Between 61.5 lb and 68.0 lb for the 6 tires listed here. The lightest is the Toyo Open Country A/T III EV (LT E); the heaviest is the Mickey Thompson Baja Boss A/T (LT E).

What wheel width do I need for 285/55R22?

Manufacturers approve 8.0–10.0″ wide wheels for this size.

How many revolutions per mile does a 285/55R22 make?

Published figures run 604–605 revolutions per mile. The calculated figure is 587.3, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 285/55R22 than 305/50R22?

0.33 inches taller on paper (34.34″ vs 34.01″), which raises the axle about 0.17″. Your speedometer will read about 1.0% slow.