265/65R18 in inches

A 265/65R18 tire is 31.6″ tall and 10.4″ wide, and fits a 18″ wheel. In inches it is written 31.6×10.4R18.

Diameter31.56″

Width10.43″

Sidewall6.78″

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

Manufacturer data

How tall 265/65R18 tires really are

Heights published by BFGoodrich, General, Michelin, Mickey Thompson and Toyo for all 23 tires in this size. Their published revolutions per mile work out to 30.6–30.7″ under load (below).

Real 265/65R18 tires measure 31.50–31.60″, against 31.56″ from the size code. Most run shorter than the size code (18 of 23).

Height under load30.6–30.7″

Published revs per mile (658–659) mean the tire rolls like a 30.6–30.7″ tire on the vehicle. Use this for speedometer calibration.

Weight spread35.0–55.4 lb

The lightest (Michelin Primacy LTX, SL) is 20.4 lb lighter per corner than the heaviest (Toyo Open Country R/T, LT E).

23 tires in 265/65R18

Sort by the spec you care about.

	Load					Revs/mi	Source
Michelin Primacy LTXAll-season	SL · 114T	31.50	35.0	9.0	2,601	659	Spec page
Michelin Primacy LTXAll-season	SL · 114T	31.50	35.1	9.5	2,601	659	Spec page
General Grabber HTS60Touring	SL · 114T	31.60	35.4	11.0	2,601	658	Spec page
Michelin X-Ice SnowWinter	SL · 114T	31.54	36.9	10.5	2,601	659	Spec page
Toyo Celsius IITouring	SL · 114T	31.54	37.1	12.0	2,601	659	Spec page
Michelin Defender LTX M/S 2All-season	XL · 116T	31.50	37.8	12.5	2,756	659	Spec page
Michelin Primacy LTXAll-season	SL · 114T	31.50	38.3	9.0	2,601	659	Spec page
General Grabber H/THighway	SL · 114T	31.60	39.0	12.0	2,601	658	Spec page
Toyo Celsius CUVAll-weather	SL · 114T	31.54	39.0	11.3	2,601	659	Spec page
Toyo Open Country H/T IIHighway	SL · 114T	31.54	39.2	12.0	2,601	659	Spec page
Toyo Open Country A/T IIIAll-terrain	SL · 114T	31.54	39.4	13.3	2,601	659	Spec page
General Grabber APTAll-terrain	SL · 114T	31.60	40.1	14.0	2,601	658	Spec page
BFGoodrich Advantage Control HTHighway	SL · 114H	31.54	40.5	12.0	2,601	659	Spec page
Toyo Open Country R/TRugged-terrain	SL · 114T	31.54	43.0	13.5	2,601	659	Spec page
Toyo OPEN COUNTRY Q/TAll-season	SL · 112H	31.54	43.2	12.8	2,469	659	Spec page
BFGoodrich Trail-Terrain T/AAll-terrain	SL · 114T	31.50	43.4	12.5	2,601	659	Spec page
BFGoodrich Trail-Terrain T/A+	SL · 114T	31.50	44.2	12.5	2,601	659	Spec page
Mickey Thompson Baja Boss A/TAll-terrain	XL · 116T	31.50	45.0	16.0	2,756	–	Spec page
General Grabber A/TXAll-terrain	SL · 114T	31.60	45.1	14.0	2,601	658	Spec page
Toyo Open Country A/T IIIAll-terrain	LT E · 122/119S	31.54	49.2	16.3	3,305	659	Spec page
BFGoodrich All-Terrain T/A KO3All-terrain	LT D · 117S	31.50	53.3	15.0	2,835	659	Spec page
Toyo Open Country R/TRugged-terrain	LT E · 122/119Q	31.50	55.4	16.4	3,305	659	Spec page
General Grabber Arctic XWinter	XL · 116T	31.60	–	12.0	2,756	658	Spec page

Is 265/65R18 a 32-inch tire?

≈32″

Close. The size code works out to 31.56″, and the 23 tires here publish 31.50–31.60″, 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 265/65R18	Difference
275/60R18	30.99	-0.57″	-1.8%
255/65R18	31.05	-0.51″	-1.6%
285/60R18	31.46	-0.10″	-0.3%
245/75R17	31.47	-0.09″	-0.3%
245/70R18	31.50	-0.06″	-0.2%
265/70R17	31.61	+0.04″	+0.1%
255/70R18	32.06	+0.49″	+1.6%
275/65R18	32.07	+0.51″	+1.6%
305/60R18	32.41	+0.85″	+2.7%
245/75R18	32.47	+0.91″	+2.9%

How to read 265/65R18

How to read any tire size

How 265/65R18 114T is printed on the sidewall. It's the most common code among the 23 tires here (15 of them); tires in this size come in other load and speed ratings too.

1265Section width

265 mm across the widest point, or 10.43 inches. Every 265 size

265Aspect ratio

A percentage, not a measurement: the sidewall is 65% as tall as the tire is wide, which is 172.3 mm or 6.78 inches.

3RConstruction

Radial construction.

418Wheel diameter

Mounts on a 18-inch wheel. Approved wheel widths run 7.5″ to 9.5″.

5114Load index

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

6TSpeed rating

Rated for up to 118 mph sustained.

Specification	Inches	Metric
Overall diameter	31.56	802 mm
Section width	10.43	265 mm
Sidewall height	6.78	172.3 mm
Circumference	99.2	2,519 mm
Revolutions per mile (calculated, unloaded)	639.0	397 per km
Revolutions per mile (published by manufacturers)	658–659	409 per km
Approved wheel width	7.5–9.5	191–241 mm

Speedometer error after switching to 265/65R18

Your actual speed– mph

Questions about 265/65R18

What is 265/65R18 in inches?

31.56 inches tall, 10.43 inches wide, on a 18-inch wheel. Written in inches, that is roughly 31.6×10.4R18.

How much does a 265/65R18 tire weigh?

Between 35.0 lb and 55.4 lb for the 22 tires listed here. The lightest is the Michelin Primacy LTX (SL); the heaviest is the Toyo Open Country R/T (LT E).

What wheel width do I need for 265/65R18?

Manufacturers approve 7.5–9.5″ wide wheels for this size.

How many revolutions per mile does a 265/65R18 make?

Published figures run 658–659 revolutions per mile. The calculated figure is 639.0, but manufacturers measure the tire under load, where it rolls on a smaller radius.

What is the difference between P265/65R18 and LT265/65R18?

Passenger tires (20 here) are built for passenger loads, with max loads of 2469–2756 lb. Light-truck tires (3 here) come in heavier load ranges with max loads of 2835–3305 lb, and are usually heavier with deeper tread.

How much taller is 265/65R18 than 245/70R18?

0.06 inches taller on paper (31.56″ vs 31.50″), which raises the axle about 0.03″. Your speedometer will read about 0.2% slow.