4WD.ai

Tire size · 18-inch wheel · about 31.0x10.8R18

275/60R18 tire size

Overall diameter, nominal31.0 in

Estimate ±787 mm

A 275/60R18 tire is 31.0 in (787 mm) tall and 10.8 in (275 mm) wide on a 18-inch wheel, with a 6.5 in sidewall, and turns about 651 times a mile.

Stock on the Honda Passport (2026–2027), per their makers’ documents.

Width
10.8 in
Sidewall
6.5 in
Wheel
18 in
Revs per mile
651

01 / Dimensions

275/60R18 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.

275/60R18

Estimate ±
Overall diameter
31.0 in 787 mm30.5 to 31.5 in for real tires
Section width
10.8 in 275 mm
Sidewall height
6.5 in 165 mm
Wheel diameter
18 in 457 mm
Circumference
97.4 in 2,473 mm
Revolutions per mile
651 404 per km641 to 661

02 / Stock on

Vehicles that leave the factory on 275/60R18

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 275/60R18 instead.

  • Honda PassportMaker
    • 2026–2027 · TrailSport, TrailSport Blackout, TrailSport Elite, TrailSport Elite Blackoutprinted 275/60R18

    Honda Passport model years on 275/60R18:

    Its other stock sizes

    • 265/60R18 (2026–2027 · RTL, RTL Towing). 275/60R18 is 0.5 in taller: with a speedometer set for 265/60R18 it reads 1.5% low, 60.9 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 275/60R18

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 275/60R18
SizeTallinHeightvs 275/60R18Widthvs 275/60R18At an indicated 60true mphCompare
255/65R1831.1+0.1 in−0.8 in60.159.2 to 61.0Compare →
285/60R1831.5+0.5 in+0.4 in60.960.0 to 61.8Compare →
245/70R1831.5+0.5 in−1.2 in61.060.1 to 61.9Compare →

Next sizes down

Next sizes down, compared with 275/60R18
SizeTallinHeightvs 275/60R18Widthvs 275/60R18At an indicated 60true mphCompare
265/60R1830.5−0.5 in−0.4 in59.158.2 to 60.0Compare →
255/60R1830.0−0.9 in−0.8 in58.257.3 to 59.0Compare →

About as tall, other wheels

About as tall, other wheels, compared with 275/60R18
SizeTallinHeightvs 275/60R18Widthvs 275/60R18At an indicated 60true mphCompare
31x10.50R1531.0±0.0 in−0.3 in60.059.1 to 60.9Compare →
285/40R2231.0±0.0 in+0.4 in60.059.1 to 60.9Compare →
255/55R2031.0+0.1 in−0.8 in60.159.2 to 61.0Compare →
255/70R1731.1+0.1 in−0.8 in60.159.2 to 61.0Compare →

04 / Next

Compare it with your size

Tire size calculator275/60R18 against 255/65R18, or any two sizes: height, speedometer and gearing.Compare sizesTire sizes by vehicleEvery stock size on the trucks and SUVs we cover.Browse sizesHonda Passport tiresStock tires and wheels by trim, and what bigger tires change on the Honda Passport.See the tires

05 / FAQ

Questions people ask

What is 275/60R18 in inches?

About 31.0x10.8R18: 31.0 in tall and 10.8 in wide on a 18-inch wheel.

Which vehicles come with 275/60R18 tires?

In our data: Honda Passport (2026–2027).

How does 275/60R18 compare with the Honda Passport’s other stock sizes?

275/60R18 is 0.5 in taller: with a speedometer set for 265/60R18 it reads 1.5% low, 60.9 mph at an indicated 60.

What is the next size up from 275/60R18?

255/65R18: about 0.1 in taller and 0.8 in narrower. On a speedometer set for 275/60R18 it reads 0.2% low (60.1 mph at an indicated 60).