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275/55R17 in inches

A 275/55R17 tire is 28.9″ tall and 10.8″ wide, and fits a 17″ wheel. In inches it is written 28.9×10.8R17.

Diameter28.91″
Width10.83″
Sidewall5.95″
275/55R17 drawn to scale: 28.91 inch diameter, 5.95 inch sidewall, 17 inch wheel, 10.83 inch tread width17″ wheel5.95″28.91″ overall10.83″ wideSide view
Drawn to scale. Nominal dimensions calculated from the size code.
Manufacturer data

How tall 275/55R17 tires really are

Heights published by General and Toyo for all 2 tires in this size. Their published revolutions per mile work out to 28.1″ under load (below).

Real 275/55R17 tires measure 28.90–28.90″, against 28.91″ from the size code. They run both taller and shorter than the size code.

Height under load28.1″

Published revs per mile (719) mean the tire rolls like a 28.1″ tire on the vehicle. Use this for speedometer calibration.

Weight spread33.9–35.5 lb

The lightest (General G-MAX AS07, SL) is 1.6 lb lighter per corner than the heaviest (Toyo Proxes ST III, SL).

2 tires in 275/55R17

Sort by the spec you care about.

LoadRevs/miSource
General G-MAX AS07PerformanceSL · 109V28.9033.911.02,271719Spec page
Toyo Proxes ST IIIPerformanceSL · 109V28.9035.510.12,271719Spec page

Is 275/55R17 a 29-inch tire?

≈29″

Yes. The size code works out to 28.91″, and the 2 tires here publish 28.90″, 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 275/55R17Difference
235/60R1728.10-0.81″-2.8%
225/65R1728.52-0.39″-1.4%
245/60R1728.57-0.33″-1.2%
235/70R1628.95+0.04″+0.1%
235/65R1729.03+0.12″+0.4%
255/55R1829.04+0.13″+0.5%
255/60R1729.05+0.14″+0.5%
255/65R1629.05+0.14″+0.5%
265/60R1729.52+0.61″+2.1%
245/65R1729.54+0.63″+2.2%

How to read 275/55R17

How to read any tire size

275/55R17 109V as printed on the tire sidewall, with each part numbered275/55R17 109V123456
How 275/55R17 109V 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

255Aspect ratio

A percentage, not a measurement: the sidewall is 55% as tall as the tire is wide, which is 151.3 mm or 5.95 inches.

3RConstruction

Radial construction.

417Wheel diameter

Mounts on a 17-inch wheel. Approved wheel widths run 7.5″ to 9.5″.

5109Load index

Each tire carries up to 2,271 lb (1,030 kg) at its maximum pressure.

6VSpeed rating

Rated for up to 149 mph sustained.

SpecificationInchesMetric
Overall diameter28.91734 mm
Section width10.83275 mm
Sidewall height5.95151.3 mm
Circumference90.82,307 mm
Revolutions per mile (calculated, unloaded)697.6433 per km
Revolutions per mile (published by manufacturers)719447 per km
Approved wheel width7.5–9.5191–241 mm

Speedometer error after switching to 275/55R17

Your actual speed– mph

Questions about 275/55R17

What is 275/55R17 in inches?

28.91 inches tall, 10.83 inches wide, on a 17-inch wheel. Written in inches, that is roughly 28.9×10.8R17.

How much does a 275/55R17 tire weigh?

Between 33.9 lb and 35.5 lb for the 2 tires listed here. The lightest is the General G-MAX AS07 (SL); the heaviest is the Toyo Proxes ST III (SL).

What wheel width do I need for 275/55R17?

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

How many revolutions per mile does a 275/55R17 make?

Published figures run 719 revolutions per mile. The calculated figure is 697.6, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 275/55R17 than 245/60R17?

0.33 inches taller on paper (28.91″ vs 28.57″), which raises the axle about 0.17″. Your speedometer will read about 1.2% slow.