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Tire size · 20-inch wheel · about 31.5x10.4R20

265/55R20 tire size

Overall diameter, nominal31.5 in

Estimate ±800 mm

A 265/55R20 tire is 31.5 in (800 mm) tall and 10.4 in (265 mm) wide on a 20-inch wheel, with a 5.7 in sidewall, and turns about 641 times a mile.

Stock on the Toyota 4Runner (2025–2026), per their makers’ documents.

Width
10.4 in
Sidewall
5.7 in
Wheel
20 in
Revs per mile
641

01 / Dimensions

265/55R20 in inches and millimeters

What the size code works out to. A real tire of the size measures within about 1.5% of it, by brand, tread, wheel width and pressure.

265/55R20

Estimate ±
Overall diameter
31.5 in 800 mm31.0 to 31.9 in for real tires
Section width
10.4 in 265 mm
Sidewall height
5.7 in 146 mm
Wheel diameter
20 in 508 mm
Circumference
98.9 in 2,512 mm
Revolutions per mile
641 398 per km631 to 650

02 / Stock on

Vehicles that leave the factory on 265/55R20

Which configurations run it in which model years, printed the way each maker prints the size, and how it compares with the vehicle’s other stock sizes. A speedometer set for one of those reads off by the amount shown when you fit 265/55R20 instead.

  • Toyota 4RunnerMaker
    • 2025–2026 · TRD Sport, TRD Sport Premium, Limited, Platinumprinted 265/55R20

    Toyota 4Runner model years on 265/55R20:

    Its other stock sizes

    • 265/70R18 (2025–2026 · TRD Off-Road, TRD Off-Road Premium, TRD Pro, Trailhunter). 265/55R20 is 1.1 in shorter: with a speedometer set for 265/70R18 it reads 3.6% high, 57.9 mph at an indicated 60.
    • 245/70R18 (2025–2026 · SR5). 265/55R20 is the same height as 245/70R18, so a speedometer set for it reads true.

Documents last checked . How we read them and what the marks mean: how we source the numbers. A figure doesn’t match its document? Report a wrong number.

03 / Nearby sizes

Sizes either side of 265/55R20

The nearest common upsizes and the next sizes down on the same wheel, from the stock sizes we cover and the sizes owners usually step up to, and sizes about as tall on another wheel.

Nearest sizes up

Nearest sizes up, compared with 265/55R20
SizeTallinHeightvs 265/55R20Widthvs 265/55R20At an indicated 60true mphCompare
245/60R2031.6+0.1 in−0.8 in60.259.3 to 61.1Compare →
275/55R2031.9+0.4 in+0.4 in60.859.9 to 61.7Compare →
305/50R2032.0+0.5 in+1.6 in61.060.1 to 61.9Compare →

Next sizes down

Next sizes down, compared with 265/55R20
SizeTallinHeightvs 265/55R20Widthvs 265/55R20At an indicated 60true mphCompare
255/55R2031.0−0.4 in−0.4 in59.258.3 to 60.1Compare →
275/50R2030.8−0.6 in+0.4 in58.857.9 to 59.6Compare →

About as tall, other wheels

About as tall, other wheels, compared with 265/55R20
SizeTallinHeightvs 265/55R20Widthvs 265/55R20At an indicated 60true mphCompare
245/75R1731.5±0.0 in−0.8 in60.059.1 to 60.9Compare →
285/60R1831.5±0.0 in+0.8 in60.059.1 to 60.9Compare →
245/70R1831.5±0.0 in−0.8 in60.159.2 to 61.0Compare →
265/65R1831.6+0.1 in±0.0 in60.259.3 to 61.1Compare →

04 / Next

Compare it with your size

Tire size calculator265/55R20 against 245/60R20, or any two sizes: height, speedometer and gearing.Compare sizesTire sizes by vehicleEvery stock size on the trucks and SUVs we cover.Browse sizesToyota 4Runner tiresStock tires and wheels by trim, and what bigger tires change on the Toyota 4Runner.See the tires

05 / FAQ

Questions people ask

What is 265/55R20 in inches?

About 31.5x10.4R20: 31.5 in tall and 10.4 in wide on a 20-inch wheel.

Which vehicles come with 265/55R20 tires?

In our data: Toyota 4Runner (2025–2026).

How does 265/55R20 compare with the Toyota 4Runner’s other stock sizes?

265/55R20 is 1.1 in shorter: with a speedometer set for 265/70R18 it reads 3.6% high, 57.9 mph at an indicated 60. 265/55R20 is the same height as 245/70R18, so a speedometer set for it reads true.

What is the next size up from 265/55R20?

245/60R20: about 0.1 in taller and 0.8 in narrower. On a speedometer set for 265/55R20 it reads 0.3% low (60.2 mph at an indicated 60).