245/40R19 in inches

A 245/40R19 tire is 26.7″ tall and 9.6″ wide, and fits a 19″ wheel. In inches it is written 26.7×9.6R19.

Diameter26.72″

Width9.65″

Sidewall3.86″

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

Manufacturer data

How tall 245/40R19 tires really are

Heights published by BFGoodrich, General, Michelin and Toyo for all 25 tires in this size. Their published revolutions per mile work out to 25.9–26.0″ under load (below).

Real 245/40R19 tires measure 26.70–26.73″, against 26.72″ from the size code. They run both taller and shorter than the size code.

Height under load25.9–26.0″

Published revs per mile (777–778) mean the tire rolls like a 25.9–26.0″ tire on the vehicle. Use this for speedometer calibration.

Weight spread23.4–31.3 lb

The lightest (Michelin Pilot Sport 4, XL) is 7.9 lb lighter per corner than the heaviest (Michelin Primacy Tour A/S, SL).

25 tires in 245/40R19

Sort by the spec you care about.

	Load					Revs/mi	Source
Michelin Pilot Sport 4Performance	XL · 98Y	26.70	23.4	9.5	1,653	778	Spec page
Michelin Pilot Sport 4 SPerformance	XL · 98(Y)	26.70	23.6	9.0	1,653	778	Spec page
General G-MAX RSPerformance	XL · 98Y	26.70	23.7	10.0	1,653	778	Spec page
General AltiMAX RT45Touring	XL · 98V	26.70	24.4	11.0	1,653	778	Spec page
Toyo Proxes Sport 2Performance	XL · 98(Y)	26.70	24.5	9.2	1,653	777	Spec page
Michelin Pilot Sport 4 SPerformance	XL · 98(Y)	26.70	25.0	9.5	1,653	778	Spec page
Michelin Pilot Alpin 5Winter	XL · 98V	26.73	25.1	9.5	1,653	778	Spec page
Toyo Proxes SportPerformance	XL · 98(Y)	26.73	25.6	9.3	1,653	777	Spec page
General G-MAX AS07Performance	XL · 98W	26.70	25.7	10.0	1,653	778	Spec page
Michelin Primacy Tour A/STouring	SL · 94W	26.70	26.2	9.0	1,477	778	Spec page
Michelin Pilot Sport All-Season 4Performance	XL · 98Y	26.70	26.7	10.0	1,653	778	Spec page
Toyo Extensa HP IIPerformance	XL · 98W	26.73	26.8	9.6	1,653	777	Spec page
Toyo Proxes G-Tour	XL · 98W	26.70	26.9	11.0	1,653	777	Spec page
Toyo Celsius IITouring	XL · 98V	26.73	27.2	11.3	1,653	777	Spec page
Toyo Proxes Sport A/SPerformance	XL · 98Y	26.73	27.2	9.4	1,653	777	Spec page
BFGoodrich g-Force Phenom T/APerformance	XL · 98Y	26.73	27.6	9.0	1,653	778	Spec page
Michelin X-Ice Snow+Winter	XL · 98H	26.73	27.8	10.5	1,653	778	Spec page
Michelin Primacy MXM4Touring	SL · 94V	26.70	27.9	10.0	1,477	778	Spec page
Michelin Pilot Sport 4Performance	XL · 98Y	26.70	28.0	9.5	1,653	778	Spec page
Michelin X-Ice SnowWinter	XL · 98H	26.73	28.6	10.5	1,653	778	Spec page
BFGoodrich g-Force COMP-2 A/S PLUSPerformance	XL · 98Y	26.73	28.7	9.0	1,477	778	Spec page
Michelin Primacy 3Performance	XL · 98Y	26.73	28.9	9.0	1,477	778	Spec page
Michelin Primacy 3Performance	XL · 98Y	26.73	28.9	9.0	1,653	778	Spec page
Michelin Pilot Sport 4 SPerformance	SL · 94Y	26.70	30.5	9.0	1,477	778	Spec page
Michelin Primacy Tour A/STouring	SL · 94V	26.70	31.3	8.5	1,477	778	Spec page

Is 245/40R19 a 27-inch tire?

≈27″

Yes. The size code works out to 26.72″, and the 25 tires here publish 26.70–26.73″, so people call it a 27.

All 27-inch tire sizes, on every wheel size.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

Size	Diameter ″	vs 245/40R19	Difference
265/35R19	26.30	-0.41″	-1.5%
235/40R19	26.40	-0.31″	-1.2%
315/30R19	26.44	-0.28″	-1.0%
275/35R19	26.58	-0.14″	-0.5%
195/50R19	26.68	-0.04″	-0.1%
325/30R19	26.68	-0.04″	-0.1%
285/35R19	26.85	+0.14″	+0.5%
225/45R19	26.97	+0.26″	+1.0%
255/40R19	27.03	+0.31″	+1.2%
295/35R19	27.13	+0.41″	+1.5%

How to read 245/40R19

How to read any tire size

How 245/40R19 98Y is printed on the sidewall. It's the most common code among the 25 tires here (9 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

240Aspect ratio

A percentage, not a measurement: the sidewall is 40% as tall as the tire is wide, which is 98.0 mm or 3.86 inches.

3RConstruction

Radial construction.

419Wheel diameter

Mounts on a 19-inch wheel. Approved wheel widths run 8.0″ to 9.5″.

598Load index

Each tire carries up to 1,653 lb (750 kg) at its maximum pressure.

6YSpeed rating

Rated for up to 186 mph sustained.

XLExtra load

Printed after the size. In this size the XL tires carry up to 1,653 lb each and the standard-load tires up to 1,477 lb, as published.

Specification	Inches	Metric
Overall diameter	26.72	679 mm
Section width	9.65	245 mm
Sidewall height	3.86	98.0 mm
Circumference	83.9	2,132 mm
Revolutions per mile (calculated, unloaded)	754.9	469 per km
Revolutions per mile (published by manufacturers)	777–778	483 per km
Approved wheel width	8.0–9.5	203–241 mm

Speedometer error after switching to 245/40R19

Your actual speed– mph

Questions about 245/40R19

What is 245/40R19 in inches?

26.72 inches tall, 9.65 inches wide, on a 19-inch wheel. Written in inches, that is roughly 26.7×9.6R19.

How much does a 245/40R19 tire weigh?

Between 23.4 lb and 31.3 lb for the 25 tires listed here. The lightest is the Michelin Pilot Sport 4 (XL); the heaviest is the Michelin Primacy Tour A/S (SL).

What wheel width do I need for 245/40R19?

Manufacturers approve 8.0–9.5″ wide wheels for this size.

How many revolutions per mile does a 245/40R19 make?

Published figures run 777–778 revolutions per mile. The calculated figure is 754.9, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 245/40R19 than 325/30R19?

0.04 inches taller on paper (26.72″ vs 26.68″), which raises the axle about 0.02″. Your speedometer will read about 0.1% slow.