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39×13.50R17 in inches

A 39×13.50R17 tire is 39.0″ tall and 13.5″ wide, and fits a 17″ wheel.

Diameter39.00″
Width13.50″
Sidewall11.00″
39×13.50R17 drawn to scale: 39.00 inch diameter, 11.00 inch sidewall, 17 inch wheel, 13.50 inch tread width17″ wheel11.00″39.00″ overall13.50″ wideSide view
Drawn to scale. Nominal dimensions calculated from the size code.
Manufacturer data

How tall 39×13.50R17 tires really are

Heights published by BFGoodrich for all 2 tires in this size. Their published revolutions per mile work out to 37.3″ under load (below).

Real 39×13.50R17 tires measure 38.50″, against 39.00″ from the size code. Every one runs shorter than the size code.

  1. BFGoodrich All-Terrain T/A KO338.50″ −0.50″
  2. BFGoodrich Mud-Terrain T/A KM338.50″ −0.50″
Each bar runs from the size code's 39.00″ (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 load37.3″

Published revs per mile (540) mean the tire rolls like a 37.3″ tire on the vehicle. Use this for speedometer calibration.

Weight spread77.3–86.9 lb

The lightest (BFGoodrich All-Terrain T/A KO3, LT D) is 9.6 lb lighter per corner than the heaviest (BFGoodrich Mud-Terrain T/A KM3, LT C).

2 tires in 39×13.50R17

Sort by the spec you care about.

LoadRevs/miSource
BFGoodrich All-Terrain T/A KO3All-terrainLT D · 121R38.5077.315.03,195540Spec page
BFGoodrich Mud-Terrain T/A KM3Mud-terrainLT C · 121Q38.5086.918.03,195540Spec page

Is a 39×13.50R17 really 39 inches tall?

38.5″

Shorter. The name says 39″, and the 2 tires here publish 38.50″.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

SizeDiameter ″vs 39×13.50R17Difference
37×12.50R1737.00-2.00″-5.1%
37×13.50R1737.00-2.00″-5.1%
38×11.50R1738.00-1.00″-2.6%
38×12.50R1738.00-1.00″-2.6%
38×11.50R1838.00-1.00″-2.6%
38×13.50R1838.00-1.00″-2.6%
38×15.50R1838.00-1.00″-2.6%
40×12.50R1740.00+1.00″+2.6%
40×13.50R1740.00+1.00″+2.6%
40×13.50R1840.00+1.00″+2.6%

How to read 39×13.50R17

How to read any tire size

39X13.50R17LT 121R as printed on the tire sidewall, with each part numbered39X13.50R17LT 121R1234567
How 39X13.50R17LT 121R 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.
139Overall diameter

39 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.

417Wheel diameter

Mounts on a 17-inch wheel. Approved wheel widths run 9.0″ to 11.5″.

5LTLight truck

Marks a light truck (LT) tire.

6121Load index

Each tire carries up to 3,195 lb (1,450 kg) at its maximum pressure.

7RSpeed rating

Rated for up to 106 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 3,195 lb each, as published.

SpecificationInchesMetric
Overall diameter39.00991 mm
Section width13.50343 mm
Sidewall height11.00279.4 mm
Circumference122.53,112 mm
Revolutions per mile (calculated, unloaded)517.1321 per km
Revolutions per mile (published by manufacturers)540336 per km
Approved wheel width9.0–11.5229–292 mm

Speedometer error after switching to 39×13.50R17

Your actual speed– mph

Questions about 39×13.50R17

What is 39×13.50R17 in inches?

39.00 inches tall, 13.50 inches wide, on a 17-inch wheel. Manufacturers publish 38.50 inches for the 2 tires listed here.

How much does a 39×13.50R17 tire weigh?

Between 77.3 lb and 86.9 lb for the 2 tires listed here. The lightest is the BFGoodrich All-Terrain T/A KO3 (LT D); the heaviest is the BFGoodrich Mud-Terrain T/A KM3 (LT C).

What wheel width do I need for 39×13.50R17?

Manufacturers approve 9.0–11.5″ wide wheels for this size.

How many revolutions per mile does a 39×13.50R17 make?

Published figures run 540 revolutions per mile. The calculated figure is 517.1, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 39×13.50R17 than 38×12.50R17?

1.00 inches taller on paper (39.00″ vs 38.00″), which raises the axle about 0.50″. Your speedometer will read about 2.6% slow.