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Tire size · 18-inch wheel · about 31.5x9.6R18

245/70R18 tire size

Overall diameter, nominal31.5 in

Estimate ±800 mm

A 245/70R18 tire is 31.5 in (800 mm) tall and 9.6 in (245 mm) wide on a 18-inch wheel, with a 6.8 in sidewall, and turns about 640 times a mile.

Stock on the Toyota 4Runner (2025–2026) and Toyota Land Cruiser (2025–2027), per their makers’ documents.

Width
9.6 in
Sidewall
6.8 in
Wheel
18 in
Revs per mile
640

01 / Dimensions

245/70R18 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.

245/70R18

Estimate ±
Overall diameter
31.5 in 800 mm31.0 to 32.0 in for real tires
Section width
9.6 in 245 mm
Sidewall height
6.8 in 172 mm
Wheel diameter
18 in 457 mm
Circumference
99.0 in 2,514 mm
Revolutions per mile
640 398 per km631 to 650

02 / Stock on

Vehicles that leave the factory on 245/70R18

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 245/70R18 instead.

  • Toyota 4RunnerMaker
    • 2025–2026 · SR5printed 245/70R18

    Toyota 4Runner model years on 245/70R18:

    Its other stock sizes

    • 265/70R18 (2025–2026 · TRD Off-Road, TRD Off-Road Premium, TRD Pro, Trailhunter). 245/70R18 is 1.1 in shorter: with a speedometer set for 265/70R18 it reads 3.5% high, 58.0 mph at an indicated 60.
    • 265/55R20 (2025–2026 · TRD Sport, TRD Sport Premium, Limited, Platinum). 245/70R18 is the same height as 265/55R20, so a speedometer set for it reads true.
  • Toyota Land CruiserMaker
    • 2025–2027 · Land Cruiser 1958printed 245/70R18

    Toyota Land Cruiser model years on 245/70R18:

    Its other stock sizes

    • 265/70R18 (2025–2027 · Land Cruiser). 245/70R18 is 1.1 in shorter: with a speedometer set for 265/70R18 it reads 3.5% high, 58.0 mph at an indicated 60.
    • 265/60R20 (2025–2027 · Land Cruiser with the 20-in. alloy wheels, with a package). 245/70R18 is 1.0 in shorter: with a speedometer set for 265/60R20 it reads 3.2% high, 58.1 mph at an indicated 60.

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 245/70R18

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 245/70R18
SizeTallinHeightvs 245/70R18Widthvs 245/70R18At an indicated 60true mphCompare
265/65R1831.6+0.1 in+0.8 in60.159.2 to 61.0Compare →
255/70R1832.1+0.6 in+0.4 in61.060.1 to 62.0Compare →
275/65R1832.1+0.6 in+1.2 in61.160.2 to 62.0Compare →

Next sizes down

Next sizes down, compared with 245/70R18
SizeTallinHeightvs 245/70R18Widthvs 245/70R18At an indicated 60true mphCompare
255/65R1831.1−0.5 in+0.4 in59.158.3 to 60.0Compare →
275/60R1831.0−0.5 in+1.2 in59.058.1 to 59.9Compare →

About as tall, other wheels

About as tall, other wheels, compared with 245/70R18
SizeTallinHeightvs 245/70R18Widthvs 245/70R18At an indicated 60true mphCompare
265/55R2031.5±0.0 in+0.8 in59.959.0 to 60.8Compare →
245/75R1731.5±0.0 in±0.0 in59.959.0 to 60.8Compare →
245/60R2031.6+0.1 in±0.0 in60.159.2 to 61.0Compare →
265/70R1731.6+0.1 in+0.8 in60.259.3 to 61.1Compare →

04 / Next

Compare it with your size

Tire size calculator245/70R18 against 265/65R18, 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 tiresToyota Land Cruiser tiresStock tires and wheels by trim, and what bigger tires change on the Toyota Land Cruiser.See the tires

05 / FAQ

Questions people ask

What is 245/70R18 in inches?

About 31.5x9.6R18: 31.5 in tall and 9.6 in wide on a 18-inch wheel.

Which vehicles come with 245/70R18 tires?

In our data: Toyota 4Runner (2025–2026) and Toyota Land Cruiser (2025–2027).

How does 245/70R18 compare with the Toyota 4Runner’s other stock sizes?

245/70R18 is 1.1 in shorter: with a speedometer set for 265/70R18 it reads 3.5% high, 58.0 mph at an indicated 60. 245/70R18 is the same height as 265/55R20, so a speedometer set for it reads true.

What is the next size up from 245/70R18?

265/65R18: about 0.1 in taller and 0.8 in wider. On a speedometer set for 245/70R18 it reads 0.2% low (60.1 mph at an indicated 60).