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265/70R20 in inches

A 265/70R20 tire is 34.6″ tall and 10.4″ wide, and fits a 20″ wheel. In inches it is written 34.6×10.4R20.

Diameter34.61″
Width10.43″
Sidewall7.30″
265/70R20 drawn to scale: 34.61 inch diameter, 7.30 inch sidewall, 20 inch wheel, 10.43 inch tread width20″ wheel7.30″34.61″ overall10.43″ wideSide view
Drawn to scale. Nominal dimensions calculated from the size code.
Manufacturer data

How tall 265/70R20 tires really are

Heights published by Toyo for the one tire in this size. Their published revolutions per mile work out to 33.6″ under load (below).

The one tire listed, the Toyo Open Country A/T III EV, measures 34.60″: 0.01″ shorter than the size code's 34.61″.

Height under load33.6″

Published revs per mile (600) mean the tire rolls like a 33.6″ tire on the vehicle. Use this for speedometer calibration.

1 tire in 265/70R20

Sort by the spec you care about.

LoadRevs/miSource
Toyo Open Country A/T III EVAll-terrainLT E · 126/123S34.6055.616.33,750600Spec page

Is 265/70R20 a 35-inch tire?

≈35″

Close. The size code works out to 34.61″, and the 1 tire here publishes 34.60″, so people call it a 35.

All 35-inch tire sizes, on every wheel size.

A true 35×11.50R20 is 0.39″ taller on paper and 1.1″ wider.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

SizeDiameter ″vs 265/70R20Difference
295/60R2033.94-0.67″-1.9%
275/65R2034.07-0.53″-1.5%
285/65R2034.59-0.02″-0.1%
315/60R2034.88+0.28″+0.8%
35×11.50R2035.00+0.39″+1.1%
35×12.50R2035.00+0.39″+1.1%
35×13.50R2035.00+0.39″+1.1%
35×15.50R2035.00+0.39″+1.1%
295/65R2035.10+0.49″+1.4%
325/60R2035.35+0.75″+2.2%

How to read 265/70R20

How to read any tire size

LT265/70R20 126/123S as printed on the tire sidewall, with each part numberedLT265/70R20 126/123S1234567
How LT265/70R20 126/123S 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.
1LTLight truck

Marks a light truck (LT) tire.

2265Section width

265 mm across the widest point, or 10.43 inches. Every 265 size

370Aspect ratio

A percentage, not a measurement: the sidewall is 70% as tall as the tire is wide, which is 185.5 mm or 7.30 inches.

4RConstruction

Radial construction.

520Wheel diameter

Mounts on a 20-inch wheel. Approved wheel widths run 7.0″ to 9.0″.

6126/123Load index

Each tire carries up to 3,750 lb (1,700 kg) on its own, or 3,415 lb (1,550 kg) each when paired on a dual rear axle.

7SSpeed rating

Rated for up to 112 mph sustained.

ELoad range

Printed separately as "LOAD RANGE E": a 10-ply rating, inflated up to 80 psi (standard load-range table). The load range E tires here carry up to 3,750 lb each, as published.

SpecificationInchesMetric
Overall diameter34.61879 mm
Section width10.43265 mm
Sidewall height7.30185.5 mm
Circumference108.72,761 mm
Revolutions per mile (calculated, unloaded)582.8362 per km
Revolutions per mile (published by manufacturers)600373 per km
Approved wheel width7.0–9.0178–229 mm

Speedometer error after switching to 265/70R20

Your actual speed– mph

Questions about 265/70R20

What is 265/70R20 in inches?

34.61 inches tall, 10.43 inches wide, on a 20-inch wheel. Written in inches, that is roughly 34.6×10.4R20.

What wheel width do I need for 265/70R20?

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

How many revolutions per mile does a 265/70R20 make?

Published figures run 600 revolutions per mile. The calculated figure is 582.8, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 265/70R20 than 285/65R20?

0.02 inches taller on paper (34.61″ vs 34.59″), which raises the axle about 0.01″. Your speedometer will read about 0.1% slow.