275/70R17 in inches

A 275/70R17 tire is 32.2″ tall and 10.8″ wide, and fits a 17″ wheel. In inches it is written 32.2×10.8R17.

Diameter32.16″

Width10.83″

Sidewall7.58″

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

Manufacturer data

How tall 275/70R17 tires really are

Heights published by BFGoodrich, General, Mickey Thompson and Toyo for all 9 tires in this size. Their published revolutions per mile work out to 31.2–31.3″ under load (below).

Real 275/70R17 tires measure 32.20–32.50″, against 32.16″ from the size code. Every one runs taller than the size code.

Mickey Thompson Baja Legend EXP32.50″ +0.34″
Toyo Open Country A/T III · 232.20″ +0.05″
Toyo Open Country R/T Trail · 232.20–32.20″ +0.05″
BFGoodrich All-Terrain T/A KO3 · 232.20″ +0.04″
BFGoodrich HD-Terrain T/A KT32.20″ +0.04″
General Grabber A/TX32.20″ +0.04″

Each bar runs from the size code's 32.16″ (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 load31.2–31.3″

Published revs per mile (645–646) mean the tire rolls like a 31.2–31.3″ tire on the vehicle. Use this for speedometer calibration.

Weight spread42.4–59.4 lb

The lightest (Toyo Open Country R/T Trail, XL) is 17.0 lb lighter per corner than the heaviest (BFGoodrich HD-Terrain T/A KT, LT E).

9 tires in 275/70R17

Sort by the spec you care about.

	Load					Revs/mi	Source
Toyo Open Country R/T TrailRugged-terrain	XL · 116T	32.20	42.4	13.5	2,756	645	Spec page
Toyo Open Country A/T IIIAll-terrain	LT E · 124/121T	32.20	50.8	16.4	3,525	645	Spec page
Toyo Open Country R/T TrailRugged-terrain	LT E · 124/121S	32.20	51.3	16.4	3,525	645	Spec page
Toyo Open Country A/T IIIAll-terrain	LT E · 121/118T	32.20	51.4	16.4	3,195	645	Spec page
General Grabber A/TXAll-terrain	LT E · 121R	32.20	53.6	16.0	3,195	646	Spec page
Mickey Thompson Baja Legend EXPAll-terrain	LT E · 121Q	32.50	55.0	18.5	3,195	–	Spec page
BFGoodrich All-Terrain T/A KO3All-terrain	LT E · 124S	32.20	57.5	16.0	3,525	646	Spec page
BFGoodrich All-Terrain T/A KO3All-terrain	LT D · 120S	32.20	57.6	15.0	3,085	646	Spec page
BFGoodrich HD-Terrain T/A KT	LT E · 124Q	32.20	59.4	18.0	3,525	646	Spec page

Is 275/70R17 a 32-inch tire?

≈32″

Yes. The size code works out to 32.16″, and the 9 tires here publish 32.20–32.50″, 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 275/70R17	Difference
245/75R17	31.47	-0.69″	-2.1%
265/70R17	31.61	-0.55″	-1.7%
235/80R17	31.80	-0.35″	-1.1%
255/70R18	32.06	-0.10″	-0.3%
255/75R17	32.06	-0.10″	-0.3%
275/65R18	32.07	-0.08″	-0.3%
305/65R17	32.61	+0.45″	+1.4%
285/70R17	32.71	+0.55″	+1.7%
33×12.50R17	33.00	+0.84″	+2.6%
33×15.50R17	33.00	+0.84″	+2.6%

How to read 275/70R17

How to read any tire size

How LT275/70R17 124S is printed on the sidewall. It's the most common code among the 9 tires here (1 of them); tires in this size come in other load and speed ratings too.

1LTLight truck

Marks a light truck (LT) tire.

2275Section width

275 mm across the widest point, or 10.83 inches. Every 275 size

370Aspect ratio

A percentage, not a measurement: the sidewall is 70% as tall as the tire is wide, which is 192.5 mm or 7.58 inches.

4RConstruction

Radial construction.

517Wheel diameter

Mounts on a 17-inch wheel. Approved wheel widths run 7.0″ to 9.0″.

6124Load index

Each tire carries up to 3,525 lb (1,600 kg) at its maximum pressure.

7SSpeed rating

Rated for up to 112 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 3,525 lb each, as published.

Specification	Inches	Metric
Overall diameter	32.16	817 mm
Section width	10.83	275 mm
Sidewall height	7.58	192.5 mm
Circumference	101.0	2,566 mm
Revolutions per mile (calculated, unloaded)	627.2	390 per km
Revolutions per mile (published by manufacturers)	645–646	401 per km
Approved wheel width	7.0–9.0	178–229 mm

Speedometer error after switching to 275/70R17

Your actual speed– mph

Questions about 275/70R17

What is 275/70R17 in inches?

32.16 inches tall, 10.83 inches wide, on a 17-inch wheel. Written in inches, that is roughly 32.2×10.8R17.

How much does a 275/70R17 tire weigh?

Between 42.4 lb and 59.4 lb for the 9 tires listed here. The lightest is the Toyo Open Country R/T Trail (XL); the heaviest is the BFGoodrich HD-Terrain T/A KT (LT E).

What wheel width do I need for 275/70R17?

Manufacturers approve 7.0–9.0″ wide wheels for this size.

How many revolutions per mile does a 275/70R17 make?

Published figures run 645–646 revolutions per mile. The calculated figure is 627.2, but manufacturers measure the tire under load, where it rolls on a smaller radius.

What is the difference between P275/70R17 and LT275/70R17?

Passenger tires (1 here) are built for passenger loads, with max loads of 2756 lb. Light-truck tires (8 here) come in heavier load ranges with max loads of 3085–3525 lb, and are usually heavier with deeper tread.

How much taller is 275/70R17 than 255/75R17?

0.10 inches taller on paper (32.16″ vs 32.06″), which raises the axle about 0.05″. Your speedometer will read about 0.3% slow.