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275/60R15 in inches

A 275/60R15 tire is 28.0″ tall and 10.8″ wide, and fits a 15″ wheel. In inches it is written 28.0×10.8R15.

Diameter27.99″
Width10.83″
Sidewall6.50″
275/60R15 drawn to scale: 27.99 inch diameter, 6.50 inch sidewall, 15 inch wheel, 10.83 inch tread width15″ wheel6.50″27.99″ overall10.83″ wideSide view
Drawn to scale. Nominal dimensions calculated from the size code.
Manufacturer data

How tall 275/60R15 tires really are

Heights published by BFGoodrich for the one tire in this size. Their published revolutions per mile work out to 27.1″ under load (below).

The one tire listed, the BFGoodrich Radial T/A, measures 28.00″: 0.01″ taller than the size code's 27.99″.

Height under load27.1″

Published revs per mile (743) mean the tire rolls like a 27.1″ tire on the vehicle. Use this for speedometer calibration.

1 tire in 275/60R15

Sort by the spec you care about.

LoadRevs/miSource
BFGoodrich Radial T/APerformanceSL · 107S28.0036.411.02,149743Spec page

Is 275/60R15 a 28-inch tire?

≈28″

Yes. The size code works out to 27.99″, and the 1 tire here publishes 28.00″, 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.

SizeDiameter ″vs 275/60R15Difference
205/75R1527.11-0.89″-3.2%
225/70R1527.40-0.59″-2.1%
215/75R1527.70-0.30″-1.1%
215/70R1627.85-0.14″-0.5%
235/70R1527.95-0.04″-0.1%
28×10.00R1428.00+0.01″+0.0%
235/65R1628.03+0.04″+0.1%
205/75R1628.11+0.11″+0.4%
225/75R1528.29+0.30″+1.1%
235/75R1528.88+0.89″+3.2%

How to read 275/60R15

How to read any tire size

P275/60R15 107S as printed on the tire sidewall, with each part numberedP275/60R15 107S1234567
How P275/60R15 107S 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.
1PP-metric

Marks a P-metric (passenger) tire. Sizes with no letter are Euro-metric.

2275Section width

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

360Aspect ratio

A percentage, not a measurement: the sidewall is 60% as tall as the tire is wide, which is 165.0 mm or 6.50 inches.

4RConstruction

Radial construction.

515Wheel diameter

Mounts on a 15-inch wheel. Approved wheel widths run 7.5″ to 9.5″.

6107Load index

Each tire carries up to 2,149 lb (975 kg) at its maximum pressure.

7SSpeed rating

Rated for up to 112 mph sustained.

SpecificationInchesMetric
Overall diameter27.99711 mm
Section width10.83275 mm
Sidewall height6.50165.0 mm
Circumference87.92,234 mm
Revolutions per mile (calculated, unloaded)720.5448 per km
Revolutions per mile (published by manufacturers)743462 per km
Approved wheel width7.5–9.5191–241 mm

Speedometer error after switching to 275/60R15

Your actual speed– mph

Questions about 275/60R15

What is 275/60R15 in inches?

27.99 inches tall, 10.83 inches wide, on a 15-inch wheel. Written in inches, that is roughly 28.0×10.8R15.

What wheel width do I need for 275/60R15?

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

How many revolutions per mile does a 275/60R15 make?

Published figures run 743 revolutions per mile. The calculated figure is 720.5, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 275/60R15 than 235/70R15?

0.04 inches taller on paper (27.99″ vs 27.95″), which raises the axle about 0.02″. Your speedometer will read about 0.1% slow.