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Tire size · 18-inch wheel · about 32.1x10.8R18

275/65R18 tire size

Overall diameter, nominal32.1 in

Estimate ±815 mm

A 275/65R18 tire is 32.1 in (815 mm) tall and 10.8 in (275 mm) wide on a 18-inch wheel, with a 7.0 in sidewall, and turns about 629 times a mile.

Stock on the Chevrolet Silverado 1500 (2019–2020), Ford Expedition (2018–2022), Ford F-150 (2024–2026) and 4 more, per their makers’ documents.

Width
10.8 in
Sidewall
7.0 in
Wheel
18 in
Revs per mile
629

01 / Dimensions

275/65R18 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.

275/65R18

Estimate ±
Overall diameter
32.1 in 815 mm31.6 to 32.6 in for real tires
Section width
10.8 in 275 mm
Sidewall height
7.0 in 179 mm
Wheel diameter
18 in 457 mm
Circumference
100.8 in 2,559 mm
Revolutions per mile
629 391 per km619 to 638

02 / Stock on

Vehicles that leave the factory on 275/65R18

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 275/65R18 instead.

  • Chevrolet Silverado 1500Maker
    • 2019–2020 · Trail Bossprinted LT275/65R18

    Chevrolet Silverado 1500 model years on 275/65R18:

    Its other stock sizes

    • 265/65R18 (2020 · Trim not specified with the 18 x 8.5 wheels with P265/65R18 tires (tire RPOs RKX, RBX, RI8), with a package). 275/65R18 is 0.5 in taller: with a speedometer set for 265/65R18 it reads 1.6% low, 61.0 mph at an indicated 60.
    • 255/70R17 (2019–2020 · WT Special Service Vehicle; Trim not specified with the 17 x 8 wheels with P255/70R17 tires (tire RPOs RBZ, RC3, RC5)). 275/65R18 is 1.0 in taller: with a speedometer set for 255/70R17 it reads 3.2% low, 62.0 mph at an indicated 60.
  • Ford ExpeditionMaker
    • 2018–2022 · XLTprinted P275/65R18

    Ford Expedition model years on 275/65R18:

  • Ford F-150Maker
    • 2026 · STX 4x4; XLT 4x4, Lariat 4x4printed 275/65R18
    • 2025 · STX 4x4; XLT 4x4; Lariatprinted 275/65R18
    • 2024 · XLT 4x4printed 275/65R18

    Ford F-150 model years on 275/65R18:

    Its other stock sizes

    • 37x12.50R17 (2024–2026 · Raptor R; Raptor with the Raptor 37 Package (802A)). 275/65R18 is 4.9 in shorter: with a speedometer set for 37x12.50R17 it reads 15.4% high, 52.0 mph at an indicated 60.
    • 315/70R17 (2024–2026 · Raptor). 275/65R18 is 2.3 in shorter: with a speedometer set for 315/70R17 it reads 7.1% high, 56.0 mph at an indicated 60.
    • 275/70R18 (2024–2026 · Tremor). 275/65R18 is 1.1 in shorter: with a speedometer set for 275/70R18 it reads 3.4% high, 58.0 mph at an indicated 60.
    • 275/60R20 (2024–2026 · King Ranch 5.5-ft box 4x2; King Ranch 4x4; Platinum 5.5-ft box 4x2; Platinum 4x4). 275/65R18 is 0.9 in shorter: with a speedometer set for 275/60R20 it reads 2.9% high, 58.3 mph at an indicated 60.
    • 265/70R17 (2024–2026 · XL 4x4). 275/65R18 is 0.5 in taller: with a speedometer set for 265/70R17 it reads 1.5% low, 60.9 mph at an indicated 60.
    • 265/60R18 (2024–2026 · STX 4x2; Lariat 5.5-ft box 4x2). 275/65R18 is 1.6 in taller: with a speedometer set for 265/60R18 it reads 4.8% low, 63.1 mph at an indicated 60.
    • 245/70R17 (2024–2026 · XL 4x2; XLT 4x2). 275/65R18 is 1.6 in taller: with a speedometer set for 245/70R17 it reads 4.9% low, 63.1 mph at an indicated 60.
  • Ford Super DutyMaker
    • 2017–2024 · Series not specified F-350 SRW with the 18-in wheels and tires (F-350 SRW)printed LT275/65R18

    Ford Super Duty model years on 275/65R18:

    Its other stock sizes

    • 285/75R18 (2020–2024 · Series not specified Crew Cab 6.75-ft box 4x4 with the Tremor Off-Road Package (17Y), with a package). 275/65R18 is 2.8 in shorter: with a speedometer set for 285/75R18 it reads 8.6% high, 55.3 mph at an indicated 60.
    • 275/70R18 (2017–2024 · Series not specified F-350 SRW with the 18-in/20-in all-terrain and 20-in all-season tires (F-350 SRW), with a package). 275/65R18 is 1.1 in shorter: with a speedometer set for 275/70R18 it reads 3.4% high, 58.0 mph at an indicated 60.
    • 225/70R19.5 (2017–2024 · Series not specified Regular Cab/Crew Cab 8-ft box F-450). 275/65R18 is 0.2 in taller: with a speedometer set for 225/70R19.5 it reads 0.5% low, 60.3 mph at an indicated 60.
    • 245/75R17 (2017–2024 · Series not specified F-250/F-350 SRW; Series not specified 8-ft box F-350 DRW). 275/65R18 is 0.6 in taller: with a speedometer set for 245/75R17 it reads 1.9% low, 61.2 mph at an indicated 60.
  • Ram 1500Maker
    • 2027 · Tradesman, Big Horn / Lone Star with the Tire option 275/65R18printed 275/65R18
    • 2025 · Tradesman with the Tire option 275/65R18printed 275/65R18
    • 2019–2020 · Tradesman with the Tire option 275/65R18printed 275/65R18

    Ram 1500 model years on 275/65R18:

    Its other stock sizes

    • 325/65R18 (2027 · RHO, TRX SRT). 275/65R18 is 2.6 in shorter: with a speedometer set for 325/65R18 it reads 8.0% high, 55.6 mph at an indicated 60.
    • 325/40R22 (2027 · Trim not specified with the Air suspension, with a package). 275/65R18 is 0.2 in shorter: with a speedometer set for 325/40R22 it reads 0.5% high, 59.7 mph at an indicated 60.
    • 285/45R22 (2027 · Trim not specified). 275/65R18 is the same height as 285/45R22, so a speedometer set for it reads true.
    • 305/50R20 (2027 · Trim not specified with the Tire option 305/50R20 (late availability), with a package). 275/65R18 is 0.1 in taller: with a speedometer set for 305/50R20 it reads 0.2% low, 60.1 mph at an indicated 60.
    • 275/55R20 (2019–2020, 2025 and 2027 · Tradesman, Limited; Big Horn / Lone Star, Laramie with the Tire option 275/55R20). 275/65R18 is 0.2 in taller: with a speedometer set for 275/55R20 it reads 0.5% low, 60.3 mph at an indicated 60.
  • Toyota SequoiaMaker
    • 2020–2022 · SR5, TRD Proprinted P275/65R18
    • 2019 · SR5printed P275/65R18
    • 2011–2017 · SR5printed P275/65R18

    Toyota Sequoia model years on 275/65R18:

    Its other stock sizes

    • 275/55R20 (2011–2017 and 2019–2022 · Limited, Platinum, TRD Sport, Nightshade). 275/65R18 is 0.2 in taller: with a speedometer set for 275/55R20 it reads 0.5% low, 60.3 mph at an indicated 60.
  • Toyota TundraMaker
    • 2019–2021 · TRD Proprinted P275/65R18
    • 2016 · TRD Proprinted P275/65R18
    • 2011–2013 · Limitedprinted P275/65R18
    • 2010 · Limitedprinted 275/65R18

    Toyota Tundra model years on 275/65R18:

    Its other stock sizes

    • 255/70R18 (2010–2013, 2016 and 2019–2021 · SR, SR5). 275/65R18 is the same height as 255/70R18, so a speedometer set for it reads true.
    • 275/55R20 (2013, 2016 and 2019–2021 · Limited, Platinum, 1794 Edition). 275/65R18 is 0.2 in taller: with a speedometer set for 275/55R20 it reads 0.5% low, 60.3 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 275/65R18

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 275/65R18
SizeTallinHeightvs 275/65R18Widthvs 275/65R18At an indicated 60true mphCompare
245/75R1832.5+0.4 in−1.2 in60.759.8 to 61.6Compare →
285/65R1832.6+0.5 in+0.4 in61.060.0 to 61.9Compare →
265/70R1832.6+0.5 in−0.4 in61.060.1 to 61.9Compare →

Next sizes down

Next sizes down, compared with 275/65R18
SizeTallinHeightvs 275/65R18Widthvs 275/65R18At an indicated 60true mphCompare
265/65R1831.6−0.5 in−0.4 in59.058.2 to 59.9Compare →
245/70R1831.5−0.6 in−1.2 in58.958.0 to 59.8Compare →

About as tall, other wheels

About as tall, other wheels, compared with 275/65R18
SizeTallinHeightvs 275/65R18Widthvs 275/65R18At an indicated 60true mphCompare
255/75R1732.1±0.0 in−0.8 in60.059.1 to 60.9Compare →
285/45R2232.1±0.0 in+0.4 in60.059.1 to 60.9Compare →
255/65R1932.1±0.0 in−0.8 in60.059.1 to 60.9Compare →
255/60R2032.0±0.0 in−0.8 in59.959.0 to 60.8Compare →

04 / Next

Compare it with your size

Tire size calculator275/65R18 against 245/75R18, or any two sizes: height, speedometer and gearing.Compare sizesTire sizes by vehicleEvery stock size on the trucks and SUVs we cover.Browse sizesChevrolet Silverado 1500 tiresStock tires and wheels by trim, and what bigger tires change on the Chevrolet Silverado 1500.See the tiresFord Expedition tiresStock tires and wheels by trim, and what bigger tires change on the Ford Expedition.See the tires

05 / FAQ

Questions people ask

What is 275/65R18 in inches?

About 32.1x10.8R18: 32.1 in tall and 10.8 in wide on a 18-inch wheel.

Which vehicles come with 275/65R18 tires?

In our data: Chevrolet Silverado 1500 (2019–2020), Ford Expedition (2018–2022), Ford F-150 (2024–2026), Ford Super Duty (2017–2024, with a package), Ram 1500 (2019–2020, 2025 and 2027, with a package), Toyota Sequoia (2011–2017 and 2019–2022) and Toyota Tundra (2010–2013, 2016 and 2019–2021).

How does 275/65R18 compare with the Ford F-150’s other stock sizes?

275/65R18 is 4.9 in shorter: with a speedometer set for 37x12.50R17 it reads 15.4% high, 52.0 mph at an indicated 60. 275/65R18 is 2.3 in shorter: with a speedometer set for 315/70R17 it reads 7.1% high, 56.0 mph at an indicated 60. 275/65R18 is 1.1 in shorter: with a speedometer set for 275/70R18 it reads 3.4% high, 58.0 mph at an indicated 60.

What is the next size up from 275/65R18?

245/75R18: about 0.4 in taller and 1.2 in narrower. On a speedometer set for 275/65R18 it reads 1.2% low (60.7 mph at an indicated 60).