tireheight.com

255/65R16 in inches

A 255/65R16 tire is 29.1″ tall and 10.0″ wide, and fits a 16″ wheel. In inches it is written 29.1×10.0R16.

Diameter29.05″
Width10.04″
Sidewall6.53″
255/65R16 drawn to scale: 29.05 inch diameter, 6.53 inch sidewall, 16 inch wheel, 10.04 inch tread width16″ wheel6.53″29.05″ overall10.04″ wideSide view
Drawn to scale. Nominal dimensions calculated from the size code.
Manufacturer data

How tall 255/65R16 tires really are

Heights published by Toyo for all 3 tires in this size. Their published revolutions per mile work out to 28.2″ under load (below).

Real 255/65R16 tires measure 29.05″, against 29.05″ from the size code. They run both taller and shorter than the size code.

Height under load28.2″

Published revs per mile (715) mean the tire rolls like a 28.2″ tire on the vehicle. Use this for speedometer calibration.

Weight spread33.2–36.5 lb

The lightest (Toyo Open Country A/T III, SL) is 3.3 lb lighter per corner than the heaviest (Toyo OPEN COUNTRY Q/T, SL).

3 tires in 255/65R16

Sort by the spec you care about.

LoadRevs/miSource
Toyo Open Country A/T IIIAll-terrainSL · 109T29.0533.213.22,271715Spec page
Toyo Observe G3-IceWinterSL · 109T29.0535.713.12,271715Spec page
Toyo OPEN COUNTRY Q/TAll-seasonSL · 109H29.0536.512.72,271715Spec page

Is 255/65R16 a 29-inch tire?

≈29″

Yes. The size code works out to 29.05″, and the 3 tires here publish 29.05″, 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 255/65R16Difference
225/70R1628.40-0.65″-2.2%
235/75R1528.88-0.17″-0.6%
275/55R1728.91-0.14″-0.5%
235/70R1628.95-0.10″-0.3%
235/65R1729.03-0.02″-0.1%
255/60R1729.05-0.00″-0.0%
255/70R1529.06+0.00″+0.0%
225/75R1629.29+0.24″+0.8%
245/70R1629.50+0.45″+1.6%
235/75R1629.88+0.83″+2.8%

How to read 255/65R16

How to read any tire size

255/65R16 109T as printed on the tire sidewall, with each part numbered255/65R16 109T123456
How 255/65R16 109T is printed on the sidewall. It's the most common code among the 3 tires here (2 of them); tires in this size come in other load and speed ratings too.
1255Section width

255 mm across the widest point, or 10.04 inches. Every 255 size

265Aspect ratio

A percentage, not a measurement: the sidewall is 65% as tall as the tire is wide, which is 165.8 mm or 6.53 inches.

3RConstruction

Radial construction.

416Wheel diameter

Mounts on a 16-inch wheel. Approved wheel widths run 7.0″ to 9.0″.

5109Load index

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

6TSpeed rating

Rated for up to 118 mph sustained.

SpecificationInchesMetric
Overall diameter29.05738 mm
Section width10.04255 mm
Sidewall height6.53165.8 mm
Circumference91.32,318 mm
Revolutions per mile (calculated, unloaded)694.2431 per km
Revolutions per mile (published by manufacturers)715444 per km
Approved wheel width7.0–9.0178–229 mm

Speedometer error after switching to 255/65R16

Your actual speed– mph

Questions about 255/65R16

What is 255/65R16 in inches?

29.05 inches tall, 10.04 inches wide, on a 16-inch wheel. Written in inches, that is roughly 29.1×10.0R16.

How much does a 255/65R16 tire weigh?

Between 33.2 lb and 36.5 lb for the 3 tires listed here. The lightest is the Toyo Open Country A/T III (SL); the heaviest is the Toyo OPEN COUNTRY Q/T (SL).

What wheel width do I need for 255/65R16?

Manufacturers approve 7.0–9.0″ wide wheels for this size.

How many revolutions per mile does a 255/65R16 make?

Published figures run 715 revolutions per mile. The calculated figure is 694.2, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 255/65R16 than 235/70R16?

0.10 inches taller on paper (29.05″ vs 28.95″), which raises the axle about 0.05″. Your speedometer will read about 0.3% slow.