32×11.50R15 in inches

A 32×11.50R15 tire is 32.0″ tall and 11.5″ wide, and fits a 15″ wheel.

Diameter32.00″

Width11.50″

Sidewall8.50″

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

Manufacturer data

How tall 32×11.50R15 tires really are

Heights published by BFGoodrich for all 2 tires in this size. Their published revolutions per mile work out to 30.6″ under load (below).

Real 32×11.50R15 tires measure 31.50″, against 32.00″ from the size code. Every one runs shorter than the size code.

BFGoodrich All-Terrain T/A KO331.50″ −0.50″
BFGoodrich Mud-Terrain T/A KM331.50″ −0.50″

Each bar runs from the size code's 32.00″ (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 load30.6″

Published revs per mile (659) mean the tire rolls like a 30.6″ tire on the vehicle. Use this for speedometer calibration.

Weight spread51.0–55.0 lb

The lightest (BFGoodrich All-Terrain T/A KO3, LT C) is 4.0 lb lighter per corner than the heaviest (BFGoodrich Mud-Terrain T/A KM3, LT C).

2 tires in 32×11.50R15

Sort by the spec you care about.

	Load					Revs/mi	Source
BFGoodrich All-Terrain T/A KO3All-terrain	LT C · 113R	31.50	51.0	15.0	2,535	659	Spec page
BFGoodrich Mud-Terrain T/A KM3Mud-terrain	LT C · 113Q	31.50	55.0	18.0	2,535	659	Spec page

Is a 32×11.50R15 really 32 inches tall?

31.5″

Shorter. The name says 32″, and the 2 tires here publish 31.50″.

All 32-inch tire sizes, on every wheel size.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

Size	Diameter ″	vs 32×11.50R15	Difference
31×10.50R15	31.00	-1.00″	-3.1%
235/85R16	31.73	-0.27″	-0.8%
32×10.00R15	32.00	0.00″	0.0%
32×9.50R15	32.00	0.00″	0.0%
32×10.00R14	32.00	0.00″	0.0%
33×10.50R15	33.00	+1.00″	+3.1%
33×12.50R15	33.00	+1.00″	+3.1%
33×13.50R15	33.00	+1.00″	+3.1%
33×15.50R15	33.00	+1.00″	+3.1%
33×9.50R15	33.00	+1.00″	+3.1%

How to read 32×11.50R15

How to read any tire size

How 32X11.50R15LT 113R 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.

132Overall diameter

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

211.50Section width

11.50 inches across the widest point, or 292 mm.

3RConstruction

Radial construction.

415Wheel diameter

Mounts on a 15-inch wheel. Approved wheel widths run 8.0″ to 10.0″.

5LTLight truck

Marks a light truck (LT) tire.

6113Load index

Each tire carries up to 2,535 lb (1,150 kg) at its maximum pressure.

7RSpeed rating

Rated for up to 106 mph sustained.

CLoad range

Printed separately as "LOAD RANGE C": a 6-ply rating, inflated up to 50 psi (standard load-range table). The load range C tires here carry up to 2,535 lb each, as published.

Specification	Inches	Metric
Overall diameter	32.00	813 mm
Section width	11.50	292 mm
Sidewall height	8.50	215.9 mm
Circumference	100.5	2,553 mm
Revolutions per mile (calculated, unloaded)	630.3	392 per km
Revolutions per mile (published by manufacturers)	659	409 per km
Approved wheel width	8.0–10.0	203–254 mm

Speedometer error after switching to 32×11.50R15

Your actual speed– mph

Questions about 32×11.50R15

What is 32×11.50R15 in inches?

32.00 inches tall, 11.50 inches wide, on a 15-inch wheel. Manufacturers publish 31.50 inches for the 2 tires listed here.

How much does a 32×11.50R15 tire weigh?

Between 51.0 lb and 55.0 lb for the 2 tires listed here. The lightest is the BFGoodrich All-Terrain T/A KO3 (LT C); the heaviest is the BFGoodrich Mud-Terrain T/A KM3 (LT C).

What wheel width do I need for 32×11.50R15?

Manufacturers approve 8.0–10.0″ wide wheels for this size.

How many revolutions per mile does a 32×11.50R15 make?

Published figures run 659 revolutions per mile. The calculated figure is 630.3, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 32×11.50R15 than 31×10.50R15?

1.00 inches taller on paper (32.00″ vs 31.00″), which raises the axle about 0.50″. Your speedometer will read about 3.2% slow.