33×13.50R20 in inches

A 33×13.50R20 tire is 33.0″ tall and 13.5″ wide, and fits a 20″ wheel.

Diameter33.00″

Width13.50″

Sidewall6.50″

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

Manufacturer data

How tall 33×13.50R20 tires really are

Heights published by Mickey Thompson for all 2 tires in this size.

Real 33×13.50R20 tires measure 32.50–32.60″, against 33.00″ from the size code. Every one runs shorter than the size code.

Mickey Thompson Baja Boss M/T32.60″ −0.40″
Mickey Thompson Baja Boss A/T32.50″ −0.50″

Each bar runs from the size code's 33.00″ (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.

2 tires in 33×13.50R20

Sort by the spec you care about.

	Load					Revs/mi	Source
Mickey Thompson Baja Boss A/TAll-terrain	LT F · 120Q	32.50	73.0	18.5	3,085	–	Spec page
Mickey Thompson Baja Boss M/TMud-terrain	LT F · 120Q	32.60	73.0	21.0	3,085	–	Spec page

Is a 33×13.50R20 really 33 inches tall?

32.5″

Shorter. The name says 33″, and the 2 tires here publish 32.50–32.60″.

All 33-inch tire sizes, on every wheel size.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

Size	Diameter ″	vs 33×13.50R20	Difference
285/55R20	32.34	-0.66″	-2.0%
265/60R20	32.52	-0.48″	-1.5%
295/55R20	32.78	-0.22″	-0.7%
275/55R21	32.91	-0.09″	-0.3%
275/60R20	32.99	-0.01″	-0.0%
33×11.50R20	33.00	0.00″	0.0%
33×12.50R20	33.00	0.00″	0.0%
305/55R20	33.21	+0.21″	+0.6%
285/60R20	33.46	+0.46″	+1.4%
295/60R20	33.94	+0.94″	+2.8%

How to read 33×13.50R20

How to read any tire size

How 33X13.50R20LT 120Q is printed on the sidewall. It's the most common code among the 2 tires here; tires in this size come in other load and speed ratings too.

133Overall diameter

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

213.50Section width

13.50 inches across the widest point, or 343 mm.

3RConstruction

Radial construction.

420Wheel diameter

Mounts on a 20-inch wheel. Approved wheel widths run 9.5″ to 12.0″.

5LTLight truck

Marks a light truck (LT) tire.

6120Load index

Each tire carries up to 3,085 lb (1,400 kg) at its maximum pressure.

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 3,085 lb each, as published.

Specification	Inches	Metric
Overall diameter	33.00	838 mm
Section width	13.50	343 mm
Sidewall height	6.50	165.1 mm
Circumference	103.7	2,633 mm
Revolutions per mile (calculated, unloaded)	611.2	380 per km
Approved wheel width	9.5–12.0	241–305 mm

Speedometer error after switching to 33×13.50R20

Your actual speed– mph

Questions about 33×13.50R20

What is 33×13.50R20 in inches?

33.00 inches tall, 13.50 inches wide, on a 20-inch wheel. Manufacturers publish 32.50–32.60 inches for the 2 tires listed here.

How much does a 33×13.50R20 tire weigh?

Between 73.0 lb and 73.0 lb for the 2 tires listed here. The lightest is the Mickey Thompson Baja Boss A/T (LT F); the heaviest is the Mickey Thompson Baja Boss A/T (LT F).

What wheel width do I need for 33×13.50R20?

Manufacturers approve 9.5–12.0″ wide wheels for this size.

How much taller is 33×13.50R20 than 275/60R20?

0.01 inches taller on paper (33.00″ vs 32.99″), which raises the axle about 0.00″. Your speedometer will read about 0.0% slow.