tireheight.com

275/30R19 in inches

A 275/30R19 tire is 25.5″ tall and 10.8″ wide, and fits a 19″ wheel. In inches it is written 25.5×10.8R19.

Diameter25.50″
Width10.83″
Sidewall3.25″
275/30R19 drawn to scale: 25.50 inch diameter, 3.25 inch sidewall, 19 inch wheel, 10.83 inch tread width19″ wheel3.25″25.50″ overall10.83″ wideSide view
Drawn to scale. Nominal dimensions calculated from the size code.
Manufacturer data

How tall 275/30R19 tires really are

Heights published by Michelin for the one tire in this size. Their published revolutions per mile work out to 24.8″ under load (below).

The one tire listed, the Michelin Pilot Sport 4 S, measures 25.60″: 0.10″ taller than the size code's 25.50″.

Height under load24.8″

Published revs per mile (814) mean the tire rolls like a 24.8″ tire on the vehicle. Use this for speedometer calibration.

1 tire in 275/30R19

Sort by the spec you care about.

LoadRevs/miSource
Michelin Pilot Sport 4 SPerformanceXL · 96(Y)25.6026.09.51,565814Spec page

Is 275/30R19 a 26-inch tire?

≈26″

Close. The size code works out to 25.50″, and the 1 tire here publishes 25.60″, so people call it a 26.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

SizeDiameter ″vs 275/30R19Difference
255/30R1925.02-0.47″-1.9%
225/35R1925.20-0.30″-1.2%
265/30R1925.26-0.24″-0.9%
235/35R1925.48-0.02″-0.1%
285/30R1925.73+0.24″+0.9%
245/35R1925.75+0.26″+1.0%
295/30R1925.97+0.47″+1.9%
255/35R1926.03+0.53″+2.1%
225/40R1926.09+0.59″+2.3%
305/30R1926.20+0.71″+2.8%

How to read 275/30R19

How to read any tire size

275/30R19 96Y as printed on the tire sidewall, with each part numbered275/30R19 96Y123456
How 275/30R19 96Y is printed on the sidewall. It's the most common code among the 1 tire 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

230Aspect ratio

A percentage, not a measurement: the sidewall is 30% as tall as the tire is wide, which is 82.5 mm or 3.25 inches.

3RConstruction

Radial construction.

419Wheel diameter

Mounts on a 19-inch wheel. Approved wheel widths run 9.0″ to 10.0″.

596Load index

Each tire carries up to 1,565 lb (710 kg) at its maximum pressure.

6YSpeed rating

Rated for up to 186 mph sustained.

XLExtra load

Printed after the size.

SpecificationInchesMetric
Overall diameter25.50648 mm
Section width10.83275 mm
Sidewall height3.2582.5 mm
Circumference80.12,034 mm
Revolutions per mile (calculated, unloaded)791.0492 per km
Revolutions per mile (published by manufacturers)814506 per km
Approved wheel width9.0–10.0229–254 mm

Speedometer error after switching to 275/30R19

Your actual speed– mph

Questions about 275/30R19

What is 275/30R19 in inches?

25.50 inches tall, 10.83 inches wide, on a 19-inch wheel. Written in inches, that is roughly 25.5×10.8R19.

What wheel width do I need for 275/30R19?

Manufacturers approve 9.0–10.0″ wide wheels for this size.

How many revolutions per mile does a 275/30R19 make?

Published figures run 814 revolutions per mile. The calculated figure is 791.0, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 275/30R19 than 235/35R19?

0.02 inches taller on paper (25.50″ vs 25.48″), which raises the axle about 0.01″. Your speedometer will read about 0.1% slow.