tireheight.com

275/45R19 in inches

A 275/45R19 tire is 28.7″ tall and 10.8″ wide, and fits a 19″ wheel. In inches it is written 28.7×10.8R19.

Diameter28.74″
Width10.83″
Sidewall4.87″
275/45R19 drawn to scale: 28.74 inch diameter, 4.87 inch sidewall, 19 inch wheel, 10.83 inch tread width19″ wheel4.87″28.74″ overall10.83″ wideSide view
Drawn to scale. Nominal dimensions calculated from the size code.
Manufacturer data

How tall 275/45R19 tires really are

Heights published by Michelin for all 2 tires in this size. Their published revolutions per mile work out to 27.9″ under load (below).

Real 275/45R19 tires measure 28.80″, against 28.74″ from the size code. Every one runs taller than the size code.

Height under load27.9″

Published revs per mile (723) mean the tire rolls like a 27.9″ tire on the vehicle. Use this for speedometer calibration.

Weight spread31.7–33.3 lb

The lightest (Michelin Latitude Sport, XL) is 1.6 lb lighter per corner than the heaviest (Michelin Pilot Sport 4, XL).

2 tires in 275/45R19

Sort by the spec you care about.

LoadRevs/miSource
Michelin Latitude SportPerformanceXL · 108Y28.8031.710.02,004723Spec page
Michelin Pilot Sport 4PerformanceXL · 108Y28.8033.39.52,205723Spec page

Is 275/45R19 a 29-inch tire?

≈29″

Yes. The size code works out to 28.74″, and the 2 tires here publish 28.80″, so people call it a 29.

All 29-inch tire sizes, on every wheel size.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

SizeDiameter ″vs 275/45R19Difference
255/45R1928.04-0.71″-2.5%
235/50R1928.25-0.49″-1.7%
295/40R1928.29-0.45″-1.6%
265/45R1928.39-0.35″-1.2%
245/50R1928.65-0.10″-0.3%
225/55R1928.740.00″0.0%
255/50R1929.04+0.30″+1.0%
285/45R1929.10+0.35″+1.2%
235/55R1929.18+0.43″+1.5%
265/50R1929.43+0.69″+2.4%

How to read 275/45R19

How to read any tire size

275/45R19 108Y as printed on the tire sidewall, with each part numbered275/45R19 108Y123456
How 275/45R19 108Y is printed on the sidewall. It's the most common code among the 2 tires here; 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

245Aspect ratio

A percentage, not a measurement: the sidewall is 45% as tall as the tire is wide, which is 123.8 mm or 4.87 inches.

3RConstruction

Radial construction.

419Wheel diameter

Mounts on a 19-inch wheel. Approved wheel widths run 8.5″ to 10.5″.

5108Load index

Each tire carries up to 2,205 lb (1,000 kg) at its maximum pressure.

6YSpeed rating

Rated for up to 186 mph sustained.

XLExtra load

Printed after the size.

SpecificationInchesMetric
Overall diameter28.74730 mm
Section width10.83275 mm
Sidewall height4.87123.8 mm
Circumference90.32,294 mm
Revolutions per mile (calculated, unloaded)701.6436 per km
Revolutions per mile (published by manufacturers)723449 per km
Approved wheel width8.5–10.5216–267 mm

Speedometer error after switching to 275/45R19

Your actual speed– mph

Questions about 275/45R19

What is 275/45R19 in inches?

28.74 inches tall, 10.83 inches wide, on a 19-inch wheel. Written in inches, that is roughly 28.7×10.8R19.

How much does a 275/45R19 tire weigh?

Between 31.7 lb and 33.3 lb for the 2 tires listed here. The lightest is the Michelin Latitude Sport (XL); the heaviest is the Michelin Pilot Sport 4 (XL).

What wheel width do I need for 275/45R19?

Manufacturers approve 8.5–10.5″ wide wheels for this size.

How many revolutions per mile does a 275/45R19 make?

Published figures run 723 revolutions per mile. The calculated figure is 701.6, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 275/45R19 than 245/50R19?

0.10 inches taller on paper (28.74″ vs 28.65″), which raises the axle about 0.05″. Your speedometer will read about 0.3% slow.