275/40R19 in inches

A 275/40R19 tire is 27.7″ tall and 10.8″ wide, and fits a 19″ wheel. In inches it is written 27.7×10.8R19.

Diameter27.66″

Width10.83″

Sidewall4.33″

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

Manufacturer data

How tall 275/40R19 tires really are

Heights published by BFGoodrich, General, Michelin and Toyo for all 19 tires in this size. Their published revolutions per mile work out to 26.9″ under load (below).

Real 275/40R19 tires measure 27.60–27.70″, against 27.66″ from the size code. They run both taller and shorter than the size code.

Height under load26.9″

Published revs per mile (751) mean the tire rolls like a 26.9″ tire on the vehicle. Use this for speedometer calibration.

Weight spread27.6–36.2 lb

The lightest (Michelin Primacy All Season, XL) is 8.6 lb lighter per corner than the heaviest (Michelin Primacy MXM4, SL).

19 tires in 275/40R19

Sort by the spec you care about.

	Load					Revs/mi	Source
Michelin Primacy All SeasonTouring	XL · 105H	27.70	27.6	8.5	2,039	751	Spec page
Michelin Pilot Sport 4 SPerformance	XL · 105(Y)	27.70	28.7	9.0	2,039	751	Spec page
General G-MAX AS07Performance	XL · 105W	27.70	28.9	10.0	2,039	751	Spec page
Toyo Proxes Sport 2Performance	XL · 105(Y)	27.70	28.9	9.2	2,039	751	Spec page
Michelin Pilot Sport 3Performance	SL · 101Y	27.68	29.1	9.0	1,819	751	Spec page
Michelin Primacy Tour A/STouring	XL · 105W	27.70	29.5	8.5	2,039	751	Spec page
Michelin Pilot Sport All-Season 4Performance	XL · 105Y	27.60	29.6	10.0	2,039	751	Spec page
Michelin CrossClimate2All-season	XL · 105V	27.70	29.9	10.0	2,039	751	Spec page
Michelin Pilot Sport 3Performance	XL · 105(Y)	27.70	30.3	9.5	2,039	751	Spec page
Michelin Pilot Sport 4 SPerformance	XL · 105(Y)	27.70	31.0	8.5	2,039	751	Spec page
BFGoodrich g-Force Phenom T/APerformance	XL · 105Y	27.68	31.1	8.0	2,039	751	Spec page
Michelin Pilot Sport 4Performance	XL · 105Y	27.70	31.3	9.0	2,039	751	Spec page
Toyo Extensa HP IIPerformance	XL · 105W	27.68	31.5	9.9	2,039	751	Spec page
Toyo Celsius SportPerformance	XL · 105Y	27.68	31.6	9.7	2,039	751	Spec page
Michelin X-Ice SnowWinter	XL · 105H	27.68	31.9	10.5	2,039	751	Spec page
BFGoodrich g-Force COMP-2 A/S PLUSPerformance	XL · 105W	27.68	32.4	9.0	1,819	751	Spec page
Toyo Observe G3-IceWinter	XL · 105T	27.68	32.6	11.3	2,039	751	Spec page
Michelin Primacy 3Performance	SL · 101Y	27.68	34.6	9.0	1,819	751	Spec page
Michelin Primacy MXM4Touring	SL · 101H	27.70	36.2	10.0	1,819	751	Spec page

Is 275/40R19 a 28-inch tire?

≈28″

Yes. The size code works out to 27.66″, and the 19 tires here publish 27.60–27.70″, so people call it a 28.

All 28-inch tire sizes, on every wheel size.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

Size	Diameter ″	vs 275/40R19	Difference
295/35R19	27.13	-0.53″	-1.9%
345/30R19	27.15	-0.51″	-1.9%
235/45R19	27.33	-0.33″	-1.2%
265/40R19	27.35	-0.31″	-1.1%
355/30R19	27.39	-0.28″	-1.0%
305/35R19	27.41	-0.26″	-0.9%
245/45R19	27.68	+0.02″	+0.1%
285/40R19	27.98	+0.31″	+1.1%
255/45R19	28.04	+0.37″	+1.4%
235/50R19	28.25	+0.59″	+2.1%

How to read 275/40R19

How to read any tire size

How 275/40R19 105W is printed on the sidewall. It's the most common code among the 19 tires here (4 of them); tires in this size come in other load and speed ratings too.

1275Section width

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

240Aspect ratio

A percentage, not a measurement: the sidewall is 40% as tall as the tire is wide, which is 110.0 mm or 4.33 inches.

3RConstruction

Radial construction.

419Wheel diameter

Mounts on a 19-inch wheel. Approved wheel widths run 9.0″ to 11.0″.

5105Load index

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

6WSpeed rating

Rated for up to 168 mph sustained.

XLExtra load

Printed after the size. In this size the XL tires carry up to 2,039 lb each and the standard-load tires up to 1,819 lb, as published.

Specification	Inches	Metric
Overall diameter	27.66	703 mm
Section width	10.83	275 mm
Sidewall height	4.33	110.0 mm
Circumference	86.9	2,207 mm
Revolutions per mile (calculated, unloaded)	729.1	453 per km
Revolutions per mile (published by manufacturers)	751	467 per km
Approved wheel width	9.0–11.0	229–279 mm

Speedometer error after switching to 275/40R19

Your actual speed– mph

Questions about 275/40R19

What is 275/40R19 in inches?

27.66 inches tall, 10.83 inches wide, on a 19-inch wheel. Written in inches, that is roughly 27.7×10.8R19.

How much does a 275/40R19 tire weigh?

Between 27.6 lb and 36.2 lb for the 19 tires listed here. The lightest is the Michelin Primacy All Season (XL); the heaviest is the Michelin Primacy MXM4 (SL).

What wheel width do I need for 275/40R19?

Manufacturers approve 9.0–11.0″ wide wheels for this size.

How many revolutions per mile does a 275/40R19 make?

Published figures run 751 revolutions per mile. The calculated figure is 729.1, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 275/40R19 than 305/35R19?

0.26 inches taller on paper (27.66″ vs 27.41″), which raises the axle about 0.13″. Your speedometer will read about 0.9% slow.