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305/50R22 in inches

A 305/50R22 tire is 34.0″ tall and 12.0″ wide, and fits a 22″ wheel. In inches it is written 34.0×12.0R22.

Diameter34.01″
Width12.01″
Sidewall6.00″
305/50R22 drawn to scale: 34.01 inch diameter, 6.00 inch sidewall, 22 inch wheel, 12.01 inch tread width22″ wheel6.00″34.01″ overall12.01″ wideSide view
Drawn to scale. Nominal dimensions calculated from the size code.
Manufacturer data

How tall 305/50R22 tires really are

Heights published by Toyo for the one tire in this size. Their published revolutions per mile work out to 33.1″ under load (below).

The one tire listed, the Toyo Open Country R/T Trail, measures 34.05″: 0.05″ taller than the size code's 34.01″.

Height under load33.1″

Published revs per mile (610) mean the tire rolls like a 33.1″ tire on the vehicle. Use this for speedometer calibration.

1 tire in 305/50R22

Sort by the spec you care about.

LoadRevs/miSource
Toyo Open Country R/T TrailRugged-terrainLT F · 124/121Q34.0566.916.83,525610Spec page

Is 305/50R22 a 34-inch tire?

≈34″

Yes. The size code works out to 34.01″, and the 1 tire here publishes 34.05″, 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 305/50R22Difference
355/40R2233.18-0.83″-2.4%
285/50R2233.22-0.79″-2.3%
295/50R2233.61-0.39″-1.2%
285/55R2234.34+0.33″+1.0%
265/60R2234.52+0.51″+1.5%
295/55R2234.78+0.77″+2.3%
325/50R2234.80+0.79″+2.3%
275/60R2234.99+0.98″+2.9%
35×12.50R2235.00+0.99″+2.9%
35×15.50R2235.00+0.99″+2.9%

How to read 305/50R22

How to read any tire size

LT305/50R22 124/121Q as printed on the tire sidewall, with each part numberedLT305/50R22 124/121Q1234567
How LT305/50R22 124/121Q 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.
1LTLight truck

Marks a light truck (LT) tire.

2305Section width

305 mm across the widest point, or 12.01 inches. Every 305 size

350Aspect ratio

A percentage, not a measurement: the sidewall is 50% as tall as the tire is wide, which is 152.5 mm or 6.00 inches.

4RConstruction

Radial construction.

522Wheel diameter

Mounts on a 22-inch wheel. Approved wheel widths run 9.0″ to 11.0″.

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.

7QSpeed rating

Rated for up to 99 mph sustained.

FLoad range

Printed separately as "LOAD RANGE F": a 12-ply rating, inflated up to 95 psi (standard load-range table). The load range F tires here carry up to 3,525 lb each, as published.

SpecificationInchesMetric
Overall diameter34.01864 mm
Section width12.01305 mm
Sidewall height6.00152.5 mm
Circumference106.82,714 mm
Revolutions per mile (calculated, unloaded)593.0368 per km
Revolutions per mile (published by manufacturers)610379 per km
Approved wheel width9.0–11.0229–279 mm

Speedometer error after switching to 305/50R22

Your actual speed– mph

Questions about 305/50R22

What is 305/50R22 in inches?

34.01 inches tall, 12.01 inches wide, on a 22-inch wheel. Written in inches, that is roughly 34.0×12.0R22.

What wheel width do I need for 305/50R22?

Manufacturers approve 9.0–11.0″ wide wheels for this size.

How many revolutions per mile does a 305/50R22 make?

Published figures run 610 revolutions per mile. The calculated figure is 593.0, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 305/50R22 than 295/50R22?

0.39 inches taller on paper (34.01″ vs 33.61″), which raises the axle about 0.20″. Your speedometer will read about 1.2% slow.