175/65R15 in inches

A 175/65R15 tire is 24.0″ tall and 6.9″ wide, and fits a 15″ wheel. In inches it is written 24.0×6.9R15.

Diameter23.96″

Width6.89″

Sidewall4.48″

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

Manufacturer data

How tall 175/65R15 tires really are

Heights published by BFGoodrich, General, Michelin and Toyo for all 8 tires in this size. Their published revolutions per mile work out to 23.3″ under load (below).

Real 175/65R15 tires measure 23.98–24.00″, against 23.96″ from the size code. Most run taller than the size code (6 of 8).

Height under load23.3″

Published revs per mile (866–867) mean the tire rolls like a 23.3″ tire on the vehicle. Use this for speedometer calibration.

Weight spread14.6–19.2 lb

The lightest (General AltiMAX RT45, SL) is 4.6 lb lighter per corner than the heaviest (Toyo Extensa A/S II, SL).

8 tires in 175/65R15

Sort by the spec you care about.

	Load					Revs/mi	Source
General AltiMAX RT45Touring	SL · 84H	24.00	14.6	11.0	1,102	867	Spec page
Michelin Energy Saver All-SeasonAll-season	SL · 84H	24.00	14.8	9.5	1,102	867	Spec page
General AltiMAX365 AWTouring	SL · 84H	24.00	15.1	11.0	1,102	867	Spec page
Michelin X-Ice SnowWinter	XL · 88T	23.98	16.5	10.5	1,235	867	Spec page
Toyo Observe G3-IceWinter	SL · 84T	23.98	18.3	11.3	1,102	866	Spec page
BFGoodrich Advantage ControlAll-season	SL · 84H	23.98	18.8	11.5	1,102	867	Spec page
Toyo Extensa A/S IIAll-season	SL · 84H	23.98	19.2	10.8	1,102	866	Spec page
General AltiMAX Arctic XWinter	XL · 88T	24.00	–	12.0	1,235	867	Spec page

Is 175/65R15 a 24-inch tire?

≈24″

Yes. The size code works out to 23.96″, and the 8 tires here publish 23.98–24.00″, so people call it a 24.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

Size	Diameter ″	vs 175/65R15	Difference
195/55R15	23.44	-0.51″	-2.1%
185/60R15	23.74	-0.22″	-0.9%
225/50R15	23.86	-0.10″	-0.4%
225/45R16	23.97	+0.02″	+0.1%
185/55R16	24.01	+0.06″	+0.2%
205/50R16	24.07	+0.11″	+0.5%
195/60R15	24.21	+0.26″	+1.1%
235/50R15	24.25	+0.30″	+1.2%
185/65R15	24.47	+0.51″	+2.1%
205/60R15	24.69	+0.73″	+3.0%

How to read 175/65R15

How to read any tire size

How 175/65R15 84H is printed on the sidewall. It's the most common code among the 8 tires here (4 of them); tires in this size come in other load and speed ratings too.

1175Section width

175 mm across the widest point, or 6.89 inches. Every 175 size

265Aspect ratio

A percentage, not a measurement: the sidewall is 65% as tall as the tire is wide, which is 113.8 mm or 4.48 inches.

3RConstruction

Radial construction.

415Wheel diameter

Mounts on a 15-inch wheel. Approved wheel widths run 5.0″ to 6.0″.

584Load index

Each tire carries up to 1,102 lb (500 kg) at its maximum pressure.

6HSpeed rating

Rated for up to 130 mph sustained.

Specification	Inches	Metric
Overall diameter	23.96	609 mm
Section width	6.89	175 mm
Sidewall height	4.48	113.8 mm
Circumference	75.3	1,912 mm
Revolutions per mile (calculated, unloaded)	841.9	523 per km
Revolutions per mile (published by manufacturers)	866–867	538–539 per km
Approved wheel width	5.0–6.0	127–152 mm

Speedometer error after switching to 175/65R15

Your actual speed– mph

Questions about 175/65R15

What is 175/65R15 in inches?

23.96 inches tall, 6.89 inches wide, on a 15-inch wheel. Written in inches, that is roughly 24.0×6.9R15.

How much does a 175/65R15 tire weigh?

Between 14.6 lb and 19.2 lb for the 7 tires listed here. The lightest is the General AltiMAX RT45 (SL); the heaviest is the Toyo Extensa A/S II (SL).

What wheel width do I need for 175/65R15?

Manufacturers approve 5.0–6.0″ wide wheels for this size.

How many revolutions per mile does a 175/65R15 make?

Published figures run 866–867 revolutions per mile. The calculated figure is 841.9, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 175/65R15 than 225/50R15?

0.10 inches taller on paper (23.96″ vs 23.86″), which raises the axle about 0.05″. Your speedometer will read about 0.4% slow.