245/60R18 in inches

A 245/60R18 tire is 29.6″ tall and 9.6″ wide, and fits a 18″ wheel. In inches it is written 29.6×9.6R18.

Diameter29.57″

Width9.65″

Sidewall5.79″

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

Manufacturer data

How tall 245/60R18 tires really are

Heights published by BFGoodrich, General, Michelin and Toyo for all 24 tires in this size. Their published revolutions per mile work out to 28.6–28.7″ under load (below).

Real 245/60R18 tires measure 29.50–29.60″, against 29.57″ from the size code. They run both taller and shorter than the size code.

Height under load28.6–28.7″

Published revs per mile (702–705) mean the tire rolls like a 28.6–28.7″ tire on the vehicle. Use this for speedometer calibration.

Weight spread29.9–39.3 lb

The lightest (General AltiMAX365 AW, SL) is 9.4 lb lighter per corner than the heaviest (BFGoodrich Trail-Terrain T/A+, SL).

24 tires in 245/60R18

Sort by the spec you care about.

	Load					Revs/mi	Source
General AltiMAX365 AWTouring	SL · 105H	29.60	29.9	11.0	2,039	702	Spec page
General Grabber H/THighway	SL · 105V	29.60	29.9	11.0	2,039	702	Spec page
Michelin Primacy Tour A/STouring	SL · 105H	29.60	30.3	8.5	2,039	703	Spec page
Michelin CrossClimate2All-season	XL · 109V	29.50	30.4	10.0	2,271	703	Spec page
Michelin Latitude Tour HPAll-season	SL · 105H	29.60	30.7	10.0	1,854	705	Spec page
Michelin Latitude Tour HPAll-season	SL · 105V	29.50	30.7	9.0	1,854	703	Spec page
General Grabber H/THighway	SL · 105T	29.60	31.0	12.0	2,039	702	Spec page
Toyo Extensa A/S IIAll-season	SL · 105H	29.57	31.1	11.7	2,039	703	Spec page
General Grabber H/THighway	SL · 105H	29.60	31.2	12.0	2,039	702	Spec page
Michelin Defender2All-season	XL · 109H	29.57	31.4	10.5	2,271	703	Spec page
Toyo Celsius IITouring	SL · 105H	29.57	31.6	11.7	2,039	703	Spec page
Toyo Proxes ST IIIPerformance	SL · 105V	29.57	31.7	10.1	2,039	703	Spec page
Michelin X-Ice SnowWinter	SL · 105T	29.57	32.0	10.5	2,039	703	Spec page
General Grabber A/TSportAll-terrain	SL · 105T	29.60	32.7	11.0	2,039	702	Spec page
Toyo Proxes G-Tour	SL · 105V	29.60	33.3	12.1	2,039	703	Spec page
General AltiMAX Arctic XWinter	XL · 109T	29.60	33.9	12.0	2,271	702	Spec page
Toyo Observe G3-IceWinter	SL · 105T	29.57	34.0	13.1	2,039	703	Spec page
Toyo Open Country A/T IIIAll-terrain	XL · 109T	29.57	34.6	13.1	2,271	703	Spec page
Toyo Open Country H/T IIHighway	XL · 109V	29.57	34.8	11.0	2,271	703	Spec page
Toyo OPEN COUNTRY Q/TAll-season	SL · 105H	29.57	34.8	12.6	2,039	703	Spec page
BFGoodrich Advantage ControlAll-season	SL · 105H	29.57	35.0	11.5	2,039	703	Spec page
BFGoodrich Elite-Force T/AAll-season	XL · 109V	29.57	36.5	10.5	2,271	703	Spec page
BFGoodrich Trail-Terrain T/AAll-terrain	SL · 105H	29.60	38.6	12.5	2,039	703	Spec page
BFGoodrich Trail-Terrain T/A+	SL · 105H	29.60	39.3	12.5	2,039	703	Spec page

Is 245/60R18 a 30-inch tire?

≈30″

Close. The size code works out to 29.57″, and the 24 tires here publish 29.50–29.60″, so people call it a 30.

All 30-inch tire sizes, on every wheel size.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

Size	Diameter ″	vs 245/60R18	Difference
225/60R18	28.63	-0.94″	-3.2%
255/55R18	29.04	-0.53″	-1.8%
235/60R18	29.10	-0.47″	-1.6%
265/50R19	29.43	-0.14″	-0.5%
265/60R17	29.52	-0.06″	-0.2%
245/65R17	29.54	-0.04″	-0.1%
245/55R19	29.61	+0.04″	+0.1%
235/65R18	30.03	+0.45″	+1.5%
255/60R18	30.05	+0.47″	+1.6%
265/60R18	30.52	+0.94″	+3.2%

How to read 245/60R18

How to read any tire size

How 245/60R18 105H is printed on the sidewall. It's the most common code among the 24 tires here (10 of them); tires in this size come in other load and speed ratings too.

1245Section width

245 mm across the widest point, or 9.65 inches. Every 245 size

260Aspect ratio

A percentage, not a measurement: the sidewall is 60% as tall as the tire is wide, which is 147.0 mm or 5.79 inches.

3RConstruction

Radial construction.

418Wheel diameter

Mounts on a 18-inch wheel. Approved wheel widths run 7.0″ to 8.5″.

5105Load index

Each tire carries up to 2,039 lb (925 kg) at its maximum pressure.

6HSpeed rating

Rated for up to 130 mph sustained.

Specification	Inches	Metric
Overall diameter	29.57	751 mm
Section width	9.65	245 mm
Sidewall height	5.79	147.0 mm
Circumference	92.9	2,360 mm
Revolutions per mile (calculated, unloaded)	681.9	424 per km
Revolutions per mile (published by manufacturers)	702–705	436–438 per km
Approved wheel width	7.0–8.5	178–216 mm

Speedometer error after switching to 245/60R18

Your actual speed– mph

Questions about 245/60R18

What is 245/60R18 in inches?

29.57 inches tall, 9.65 inches wide, on a 18-inch wheel. Written in inches, that is roughly 29.6×9.6R18.

How much does a 245/60R18 tire weigh?

Between 29.9 lb and 39.3 lb for the 24 tires listed here. The lightest is the General AltiMAX365 AW (SL); the heaviest is the BFGoodrich Trail-Terrain T/A+ (SL).

What wheel width do I need for 245/60R18?

Manufacturers approve 7.0–8.5″ wide wheels for this size.

How many revolutions per mile does a 245/60R18 make?

Published figures run 702–705 revolutions per mile. The calculated figure is 681.9, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 245/60R18 than 235/60R18?

0.47 inches taller on paper (29.57″ vs 29.10″), which raises the axle about 0.24″. Your speedometer will read about 1.6% slow.