tireheight.com

33×12.50R20 in inches

A 33×12.50R20 tire is 33.0″ tall and 12.5″ wide, and fits a 20″ wheel.

Diameter33.00″
Width12.50″
Sidewall6.50″
33×12.50R20 drawn to scale: 33.00 inch diameter, 6.50 inch sidewall, 20 inch wheel, 12.50 inch tread width20″ wheel6.50″33.00″ overall12.50″ wideSide view
Drawn to scale. Nominal dimensions calculated from the size code.
Manufacturer data

How tall 33×12.50R20 tires really are

Heights published by BFGoodrich, General, Mickey Thompson and Toyo for all 14 tires in this size. Their published revolutions per mile work out to 31.5–32.0″ under load (below).

Real 33×12.50R20 tires measure 32.50–33.00″, against 33.00″ from the size code. Most run shorter than the size code (12 of 14).

  1. General Grabber A/TX33.00″ +0.00″
  2. General Grabber X333.00″ +0.00″
  3. Toyo Open Country M/T · 232.76–32.95″ −0.24″
  4. Mickey Thompson Baja Boss A/T32.80″ −0.20″
  5. Mickey Thompson Baja Legend EXP32.80″ −0.20″
  6. Mickey Thompson Baja Legend MTZ32.80″ −0.20″
  7. Toyo Open Country R/T Pro32.80″ −0.20″
  8. Toyo Open Country R/T32.76″ −0.24″
  9. Mickey Thompson Baja Boss M/T32.70″ −0.30″
  10. Toyo Open Country A/T III32.52″ −0.48″
  11. Toyo Open Country R/T Trail32.52″ −0.48″
  12. BFGoodrich All-Terrain T/A KO332.50″ −0.50″
  13. BFGoodrich Mud-Terrain T/A KM332.50″ −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.
Height under load31.5–32.0″

Published revs per mile (630–640) mean the tire rolls like a 31.5–32.0″ tire on the vehicle. Use this for speedometer calibration.

Weight spread61.1–73.2 lb

The lightest (General Grabber A/TX, LT E) is 12.1 lb lighter per corner than the heaviest (Toyo Open Country M/T, LT F).

14 tires in 33×12.50R20

Sort by the spec you care about.

LoadRevs/miSource
General Grabber A/TXAll-terrainLT E · 114S33.0061.116.02,600630Spec page
Toyo Open Country A/T IIIAll-terrainLT F · 119Q32.5262.816.93,000639Spec page
Mickey Thompson Baja Legend EXPAll-terrainLT E · 114Q32.8063.018.52,600–Spec page
BFGoodrich All-Terrain T/A KO3All-terrainLT E · 114S32.5063.315.02,600640Spec page
Toyo Open Country R/T TrailRugged-terrainLT E · 114Q32.5264.716.92,600639Spec page
Mickey Thompson Baja Legend MTZMud-terrainLT E · 114Q32.8065.021.02,600–Spec page
BFGoodrich Mud-Terrain T/A KM3Mud-terrainLT E · 114Q32.5066.218.02,600640Spec page
Mickey Thompson Baja Boss A/TAll-terrainLT E · 114Q32.8068.018.52,600–Spec page
Mickey Thompson Baja Boss M/TMud-terrainLT E · 114Q32.7068.021.02,600–Spec page
Toyo Open Country R/TRugged-terrainLT E · 114Q32.7668.818.92,600634Spec page
General Grabber X3Mud-terrainLT E · 114Q33.0068.921.02,601630Spec page
Toyo Open Country R/T ProRugged-terrainLT F · 119Q32.8071.719.93,000634Spec page
Toyo Open Country M/TMud-terrainLT E · 114Q32.9572.721.02,600630Spec page
Toyo Open Country M/TMud-terrainLT F · 119Q32.7673.221.03,000634Spec page

Is a 33×12.50R20 really 33 inches tall?

32.7″

Mostly. The name says 33″, and the 14 tires here publish 32.50–33.00″.

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

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

SizeDiameter ″vs 33×12.50R20Difference
285/55R2032.34-0.66″-2.0%
265/60R2032.52-0.48″-1.5%
295/55R2032.78-0.22″-0.7%
275/55R2132.91-0.09″-0.3%
275/60R2032.99-0.01″-0.0%
33×11.50R2033.000.00″0.0%
33×13.50R2033.000.00″0.0%
305/55R2033.21+0.21″+0.6%
285/60R2033.46+0.46″+1.4%
295/60R2033.94+0.94″+2.8%

How to read 33×12.50R20

How to read any tire size

33X12.50R20LT 114Q as printed on the tire sidewall, with each part numbered33X12.50R20LT 114Q1234567
How 33X12.50R20LT 114Q is printed on the sidewall. It's the most common code among the 14 tires here (9 of them); 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.

212.50Section width

12.50 inches across the widest point, or 318 mm.

3RConstruction

Radial construction.

420Wheel diameter

Mounts on a 20-inch wheel. Approved wheel widths run 8.5″ to 11.0″.

5LTLight truck

Marks a light truck (LT) tire.

6114Load index

Each tire carries up to 2,601 lb (1,180 kg) at its maximum pressure.

7QSpeed rating

Rated for up to 99 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 2,601 lb each, as published.

SpecificationInchesMetric
Overall diameter33.00838 mm
Section width12.50318 mm
Sidewall height6.50165.1 mm
Circumference103.72,633 mm
Revolutions per mile (calculated, unloaded)611.2380 per km
Revolutions per mile (published by manufacturers)630–640391–398 per km
Approved wheel width8.5–11.0216–279 mm

Speedometer error after switching to 33×12.50R20

Your actual speed– mph

Questions about 33×12.50R20

What is 33×12.50R20 in inches?

33.00 inches tall, 12.50 inches wide, on a 20-inch wheel. Manufacturers publish 32.50–33.00 inches for the 14 tires listed here.

How much does a 33×12.50R20 tire weigh?

Between 61.1 lb and 73.2 lb for the 14 tires listed here. The lightest is the General Grabber A/TX (LT E); the heaviest is the Toyo Open Country M/T (LT F).

What wheel width do I need for 33×12.50R20?

Manufacturers approve 8.5–11.0″ wide wheels for this size.

How many revolutions per mile does a 33×12.50R20 make?

Published figures run 630–640 revolutions per mile. The calculated figure is 611.2, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 33×12.50R20 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.