235/80R17 in inches

A 235/80R17 tire is 31.8″ tall and 9.3″ wide, and fits a 17″ wheel. In inches it is written 31.8×9.3R17.

Diameter31.80″

Width9.25″

Sidewall7.40″

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

Manufacturer data

How tall 235/80R17 tires really are

Heights published by BFGoodrich, General, Michelin and Toyo for all 17 tires in this size. Their published revolutions per mile work out to 30.8–31.1″ under load (below).

Real 235/80R17 tires measure 31.80–32.05″, against 31.80″ from the size code. They run both taller and shorter than the size code.

Toyo Open Country C/T32.05″ +0.24″
Toyo M-5532.01″ +0.20″
Toyo M65532.01″ +0.20″
Toyo Open Country WLT131.93″ +0.13″
Toyo Open Country A/T III31.81″ +0.01″
Toyo Open Country H/T II31.81″ +0.01″
BFGoodrich HD Pro T/A31.81″ +0.01″
BFGoodrich All-Terrain T/A KO331.80″ −0.00″
BFGoodrich HD-Terrain T/A KT31.80″ −0.00″
General Grabber A/TX31.80″ −0.00″
General Grabber APT31.80″ −0.00″
General Grabber H/T31.80″ −0.00″
General Grabber HD31.80″ −0.00″
Michelin Agilis CrossClimate 231.80″ −0.00″
Michelin Energy Saver All-Season31.80″ −0.00″
Michelin LTX A/T231.80″ −0.00″
Michelin Primacy XC31.80″ −0.00″

Each bar runs from the size code's 31.80″ (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 load30.8–31.1″

Published revs per mile (648–654) mean the tire rolls like a 30.8–31.1″ tire on the vehicle. Use this for speedometer calibration.

Weight spread42.4–52.9 lb

The lightest (BFGoodrich HD Pro T/A, LT E) is 10.5 lb lighter per corner than the heaviest (Toyo Open Country C/T, LT E).

17 tires in 235/80R17

Sort by the spec you care about.

	Load					Revs/mi	Source
BFGoodrich HD Pro T/ACommercial	LT E · 120/117R	31.81	42.4	13.0	3,085	654	Spec page
General Grabber HDCommercial	LT E · 120R	31.80	42.8	14.0	3,085	653	Spec page
Michelin LTX A/T2All-terrain	LT E · 120/117R	31.80	43.3	13.5	3,085	654	Spec page
Toyo Open Country A/T IIIAll-terrain	LT E · 120/117R	31.81	43.4	16.0	3,085	653	Spec page
Michelin Energy Saver All-SeasonAll-season	LT E · 120/117R	31.80	43.6	11.5	3,085	654	Spec page
General Grabber H/THighway	LT E · 120R	31.80	43.9	14.0	3,085	653	Spec page
Michelin Primacy XCAll-terrain	LT E · 120/117R	31.80	44.0	12.0	3,085	654	Spec page
Toyo Open Country WLT1Winter	LT E · 120/117Q	31.93	44.8	16.1	3,085	651	Spec page
Toyo Open Country H/T IIHighway	LT E · 120/117S	31.81	45.4	14.4	3,085	653	Spec page
General Grabber A/TXAll-terrain	LT E · 120R	31.80	45.6	16.0	3,086	653	Spec page
Michelin Agilis CrossClimate 2Commercial	LT E · 120/117R	31.80	45.8	14.0	3,085	654	Spec page
General Grabber APTAll-terrain	LT E · 120R	31.80	46.5	16.0	3,085	653	Spec page
Toyo M-55Commercial	LT E · 120/117Q	32.01	48.5	17.6	3,085	649	Spec page
BFGoodrich All-Terrain T/A KO3All-terrain	LT E · 120S	31.80	49.0	15.0	3,085	654	Spec page
Toyo M655Commercial	LT E · 120/117Q	32.01	50.7	18.5	3,085	649	Spec page
BFGoodrich HD-Terrain T/A KT	LT E · 120Q	31.80	51.5	18.0	3,085	654	Spec page
Toyo Open Country C/TCommercial	LT E · 120/117Q	32.05	52.9	18.3	3,085	648	Spec page

Is 235/80R17 a 32-inch tire?

≈32″

Yes. The size code works out to 31.80″, and the 17 tires here publish 31.80–32.05″, so people call it a 32.

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 235/80R17	Difference
255/70R17	31.06	-0.75″	-2.4%
275/65R17	31.07	-0.73″	-2.3%
245/75R17	31.47	-0.33″	-1.1%
265/70R17	31.61	-0.20″	-0.6%
265/75R16	31.65	-0.15″	-0.5%
235/85R16	31.73	-0.07″	-0.2%
255/75R17	32.06	+0.26″	+0.8%
275/70R17	32.16	+0.35″	+1.1%
305/65R17	32.61	+0.81″	+2.5%
285/70R17	32.71	+0.91″	+2.8%

How to read 235/80R17

How to read any tire size

How LT235/80R17 120/117R is printed on the sidewall. It's the most common code among the 17 tires here (6 of them); tires in this size come in other load and speed ratings too.

1LTLight truck

Marks a light truck (LT) tire.

2235Section width

235 mm across the widest point, or 9.25 inches. Every 235 size

380Aspect ratio

A percentage, not a measurement: the sidewall is 80% as tall as the tire is wide, which is 188.0 mm or 7.40 inches.

4RConstruction

Radial construction.

517Wheel diameter

Mounts on a 17-inch wheel. Approved wheel widths run 6.0″ to 8.0″.

6120/117Load index

Each tire carries up to 3,085 lb (1,400 kg) on its own, or 2,833 lb (1,285 kg) each when paired on a dual rear axle.

7RSpeed rating

Rated for up to 106 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 3,086 lb each, as published.

Specification	Inches	Metric
Overall diameter	31.80	808 mm
Section width	9.25	235 mm
Sidewall height	7.40	188.0 mm
Circumference	99.9	2,538 mm
Revolutions per mile (calculated, unloaded)	634.2	394 per km
Revolutions per mile (published by manufacturers)	648–654	403–406 per km
Approved wheel width	6.0–8.0	152–203 mm

Speedometer error after switching to 235/80R17

Your actual speed– mph

Questions about 235/80R17

What is 235/80R17 in inches?

31.80 inches tall, 9.25 inches wide, on a 17-inch wheel. Written in inches, that is roughly 31.8×9.3R17.

How much does a 235/80R17 tire weigh?

Between 42.4 lb and 52.9 lb for the 17 tires listed here. The lightest is the BFGoodrich HD Pro T/A (LT E); the heaviest is the Toyo Open Country C/T (LT E).

What wheel width do I need for 235/80R17?

Manufacturers approve 6.0–8.0″ wide wheels for this size.

How many revolutions per mile does a 235/80R17 make?

Published figures run 648–654 revolutions per mile. The calculated figure is 634.2, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 235/80R17 than 265/70R17?

0.20 inches taller on paper (31.80″ vs 31.61″), which raises the axle about 0.10″. Your speedometer will read about 0.6% slow.