40×15.50R22 in inches

A 40×15.50R22 tire is 40.0″ tall and 15.5″ wide, and fits a 22″ wheel.

Diameter40.00″

Width15.50″

Sidewall9.00″

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

Manufacturer data

How tall 40×15.50R22 tires really are

Heights published by Toyo for all 2 tires in this size. Their published revolutions per mile work out to 38.6″ under load (below).

Real 40×15.50R22 tires measure 39.72–39.80″, against 40.00″ from the size code. Every one runs shorter than the size code.

Toyo Open Country R/T Pro39.80″ −0.20″
Toyo Open Country M/T39.72″ −0.28″

Each bar runs from the size code's 40.00″ (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 load38.6″

Published revs per mile (522–523) mean the tire rolls like a 38.6″ tire on the vehicle. Use this for speedometer calibration.

Weight spread99.2–109.0 lb

The lightest (Toyo Open Country R/T Pro, LT E) is 9.8 lb lighter per corner than the heaviest (Toyo Open Country M/T, LT D).

2 tires in 40×15.50R22

Sort by the spec you care about.

	Load					Revs/mi	Source
Toyo Open Country R/T ProRugged-terrain	LT E · 128Q	39.80	99.2	19.9	3,970	522	Spec page
Toyo Open Country M/TMud-terrain	LT D · 127Q	39.72	109.0	21.0	3,860	523	Spec page

Is a 40×15.50R22 really 40 inches tall?

39.8″

Shorter. The name says 40″, and the 2 tires here publish 39.72–39.80″.

All 40-inch tire sizes, on every wheel size.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

Size	Diameter ″	vs 40×15.50R22	Difference
38×15.50R22	38.00	-2.00″	-5.0%

How to read 40×15.50R22

How to read any tire size

How 40X15.50R22LT 127Q is printed on the sidewall. It's the most common code among the 2 tires here (1 of them); tires in this size come in other load and speed ratings too.

140Overall diameter

40 inches tall, measured on the approved wheel. Flotation sizes give every number in inches.

215.50Section width

15.50 inches across the widest point, or 394 mm.

3RConstruction

Radial construction.

422Wheel diameter

Mounts on a 22-inch wheel. Approved wheel widths run 11.0″ to 14.0″.

5LTLight truck

Marks a light truck (LT) tire.

6127Load index

Each tire carries up to 3,860 lb (1,750 kg) at its maximum pressure.

7QSpeed rating

Rated for up to 99 mph sustained.

DLoad range

Printed separately as "LOAD RANGE D": a 8-ply rating, inflated up to 65 psi (standard load-range table). The load range D tires here carry up to 3,860 lb each, as published.

Specification	Inches	Metric
Overall diameter	40.00	1016 mm
Section width	15.50	394 mm
Sidewall height	9.00	228.6 mm
Circumference	125.7	3,192 mm
Revolutions per mile (calculated, unloaded)	504.2	313 per km
Revolutions per mile (published by manufacturers)	522–523	324–325 per km
Approved wheel width	11.0–14.0	279–356 mm

Speedometer error after switching to 40×15.50R22

Your actual speed– mph

Questions about 40×15.50R22

What is 40×15.50R22 in inches?

40.00 inches tall, 15.50 inches wide, on a 22-inch wheel. Manufacturers publish 39.72–39.80 inches for the 2 tires listed here.

How much does a 40×15.50R22 tire weigh?

Between 99.2 lb and 109.0 lb for the 2 tires listed here. The lightest is the Toyo Open Country R/T Pro (LT E); the heaviest is the Toyo Open Country M/T (LT D).

What wheel width do I need for 40×15.50R22?

Manufacturers approve 11.0–14.0″ wide wheels for this size.

How many revolutions per mile does a 40×15.50R22 make?

Published figures run 522–523 revolutions per mile. The calculated figure is 504.2, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 40×15.50R22 than 38×15.50R22?

2.00 inches taller on paper (40.00″ vs 38.00″), which raises the axle about 1.00″. Your speedometer will read about 5.3% slow.