tireheight.com

275/50R20 in inches

A 275/50R20 tire is 30.8″ tall and 10.8″ wide, and fits a 20″ wheel. In inches it is written 30.8×10.8R20.

Diameter30.83″
Width10.83″
Sidewall5.41″
275/50R20 drawn to scale: 30.83 inch diameter, 5.41 inch sidewall, 20 inch wheel, 10.83 inch tread width20″ wheel5.41″30.83″ overall10.83″ wideSide view
Drawn to scale. Nominal dimensions calculated from the size code.
Manufacturer data

How tall 275/50R20 tires really are

Heights published by General, Michelin and Toyo for all 15 tires in this size. Their published revolutions per mile work out to 29.9–30.0″ under load (below).

Real 275/50R20 tires measure 30.80–30.90″, against 30.83″ from the size code. Most run taller than the size code (13 of 15).

Height under load29.9–30.0″

Published revs per mile (673–674) mean the tire rolls like a 29.9–30.0″ tire on the vehicle. Use this for speedometer calibration.

Weight spread32.2–43.2 lb

The lightest (Michelin Pilot Sport All-Season 4, XL) is 11.0 lb lighter per corner than the heaviest (Michelin Latitude Sport 3, XL).

15 tires in 275/50R20

Sort by the spec you care about.

LoadRevs/miSource
Michelin Pilot Sport All-Season 4PerformanceXL · 113Y30.9032.210.02,535674Spec page
Michelin CrossClimate2All-seasonXL · 113V30.8034.110.02,535674Spec page
Michelin Primacy Tour A/STouringSL · 109H30.9035.08.52,271674Spec page
Michelin Primacy Tour A/STouringSL · 109H30.9035.78.52,271674Spec page
Toyo Proxes Sport 2PerformanceXL · 113Y30.9036.29.22,535673Spec page
Michelin Pilot Alpin 5WinterXL · 113V30.8736.210.52,535674Spec page
Michelin Pilot Alpin 5WinterXL · 113V30.8736.410.52,535674Spec page
Michelin Pilot Sport 4 SUVPerformanceXL · 113Y30.9036.49.52,535674Spec page
Michelin X-Ice Snow+WinterXL · 113H30.8737.010.52,535674Spec page
Michelin X-Ice SnowWinterXL · 113T30.8737.610.52,535674Spec page
Toyo Proxes ST IIIPerformanceXL · 113W30.8739.810.12,535673Spec page
Toyo Celsius SportPerformanceSL · 113V30.9040.111.02,535673Spec page
General Grabber HTS60TouringXL · 113H30.8040.312.02,535674Spec page
Toyo Observe G3-IceWinterSL · 109T30.8740.812.02,271673Spec page
Michelin Latitude Sport 3PerformanceXL · 113W30.9043.28.52,535674Spec page

Is 275/50R20 a 31-inch tire?

≈31″

Yes. The size code works out to 30.83″, and the 15 tires here publish 30.80–30.90″, so people call it a 31.

All 31-inch tire sizes, on every wheel size.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

SizeDiameter ″vs 275/50R20Difference
285/45R2030.10-0.73″-2.4%
235/55R2030.18-0.65″-2.1%
265/50R2030.43-0.39″-1.3%
295/45R2030.45-0.37″-1.2%
305/45R2030.81-0.02″-0.1%
255/55R2031.04+0.22″+0.7%
235/60R2031.10+0.28″+0.9%
285/50R2031.22+0.39″+1.3%
265/55R2031.48+0.65″+2.1%
245/60R2031.57+0.75″+2.4%

How to read 275/50R20

How to read any tire size

275/50R20 113V as printed on the tire sidewall, with each part numbered275/50R20 113V123456
How 275/50R20 113V is printed on the sidewall. It's the most common code among the 15 tires here (3 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

250Aspect ratio

A percentage, not a measurement: the sidewall is 50% as tall as the tire is wide, which is 137.5 mm or 5.41 inches.

3RConstruction

Radial construction.

420Wheel diameter

Mounts on a 20-inch wheel. Approved wheel widths run 7.5″ to 9.5″.

5113Load index

Each tire carries up to 2,535 lb (1,150 kg) at its maximum pressure.

6VSpeed rating

Rated for up to 149 mph sustained.

XLExtra load

Printed after the size. In this size the XL tires carry up to 2,535 lb each and the standard-load tires up to 2,535 lb, as published.

SpecificationInchesMetric
Overall diameter30.83783 mm
Section width10.83275 mm
Sidewall height5.41137.5 mm
Circumference96.82,460 mm
Revolutions per mile (calculated, unloaded)654.2407 per km
Revolutions per mile (published by manufacturers)673–674418–419 per km
Approved wheel width7.5–9.5191–241 mm

Speedometer error after switching to 275/50R20

Your actual speed– mph

Questions about 275/50R20

What is 275/50R20 in inches?

30.83 inches tall, 10.83 inches wide, on a 20-inch wheel. Written in inches, that is roughly 30.8×10.8R20.

How much does a 275/50R20 tire weigh?

Between 32.2 lb and 43.2 lb for the 15 tires listed here. The lightest is the Michelin Pilot Sport All-Season 4 (XL); the heaviest is the Michelin Latitude Sport 3 (XL).

What wheel width do I need for 275/50R20?

Manufacturers approve 7.5–9.5″ wide wheels for this size.

How many revolutions per mile does a 275/50R20 make?

Published figures run 673–674 revolutions per mile. The calculated figure is 654.2, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 275/50R20 than 305/45R20?

0.02 inches taller on paper (30.83″ vs 30.81″), which raises the axle about 0.01″. Your speedometer will read about 0.1% slow.