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Tire size · 17-inch wheel · about 31.1x10.0R17

255/70R17 tire size

Overall diameter, nominal31.1 in

Estimate ±789 mm

A 255/70R17 tire is 31.1 in (789 mm) tall and 10.0 in (255 mm) wide on a 17-inch wheel, with a 7.0 in sidewall, and turns about 649 times a mile.

Stock on the Chevrolet Silverado 1500 (2019–2026), Chevrolet Tahoe (2015–2020), Ford Ranger (2024–2026) and 1 more, per their makers’ documents.

Width
10.0 in
Sidewall
7.0 in
Wheel
17 in
Revs per mile
649

01 / Dimensions

255/70R17 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.

255/70R17

Estimate ±
Overall diameter
31.1 in 789 mm30.6 to 31.5 in for real tires
Section width
10.0 in 255 mm
Sidewall height
7.0 in 179 mm
Wheel diameter
17 in 432 mm
Circumference
97.6 in 2,478 mm
Revolutions per mile
649 404 per km640 to 659

02 / Stock on

Vehicles that leave the factory on 255/70R17

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 255/70R17 instead.

  • Chevrolet Silverado 1500Maker
    • 2021–2026 · WT Special Service Vehicleprinted 255/70R17
    • 2020 · WT Special Service Vehicle; Trim not specified with the 17 x 8 wheels with P255/70R17 tires (tire RPOs RBZ, RC3, RC5)printed P255/70R17, 255/70R17
    • 2019 · WT Special Service Vehicleprinted 255/70R17

    Chevrolet Silverado 1500 model years on 255/70R17:

    Its other stock sizes

    • 275/70R18 (2022 · ZR2). 255/70R17 is 2.1 in shorter: with a speedometer set for 275/70R18 it reads 6.8% high, 56.2 mph at an indicated 60.
    • 275/60R20 (2023–2026 · WT Police Pursuit Vehicle). 255/70R17 is 1.9 in shorter: with a speedometer set for 275/60R20 it reads 6.2% high, 56.5 mph at an indicated 60.
    • 275/65R18 (2019–2020 · Trail Boss). 255/70R17 is 1.0 in shorter: with a speedometer set for 275/65R18 it reads 3.3% high, 58.1 mph at an indicated 60.
    • 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). 255/70R17 is 0.5 in shorter: with a speedometer set for 265/65R18 it reads 1.6% high, 59.0 mph at an indicated 60.
  • Chevrolet TahoeMaker
    • 2015–2020 · Special Service Vehicle (5W4), fleetprinted P255/70R17

    Chevrolet Tahoe model years on 255/70R17:

    Its other stock sizes

    • 265/60R17 (2015–2020 · Police Pursuit Vehicle (9C1), fleet). 255/70R17 is 1.5 in taller: with a speedometer set for 265/60R17 it reads 4.9% low, 63.1 mph at an indicated 60.
  • Ford RangerMaker
    • 2024–2026 · XL; XLTprinted 255/70R17

    Ford Ranger model years on 255/70R17:

    Its other stock sizes

    • 285/70R17 (2024–2026 · Raptor). 255/70R17 is 1.7 in shorter: with a speedometer set for 285/70R17 it reads 5.3% high, 57.0 mph at an indicated 60.
    • 255/65R18 (2024–2026 · Lariat). 255/70R17 is the same height as 255/65R18, so a speedometer set for it reads true.
  • Volkswagen AmarokMaker
    • 2025 · Australia · Core, Lifeprinted 255/70R17
    • 2023 · Australia · Core, Lifeprinted 255/70R17

    Volkswagen Amarok model years on 255/70R17:

    Its other stock sizes

    • 255/65R18 (2023 and 2025 · Style; PanAmericana). 255/70R17 is the same height as 255/65R18, so a speedometer set for it reads true.
    • 275/45R21 (2023 and 2025 · Aventura). 255/70R17 is 0.3 in taller: with a speedometer set for 275/45R21 it reads 1.0% low, 60.6 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 255/70R17

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 255/70R17
SizeTallinHeightvs 255/70R17Widthvs 255/70R17At an indicated 60true mphCompare
245/75R1731.5+0.4 in−0.4 in60.859.9 to 61.7Compare →
265/70R1731.6+0.6 in+0.4 in61.160.1 to 62.0Compare →
255/75R1732.1+1.0 in±0.0 in61.961.0 to 62.9Compare →

Next sizes down

Next sizes down, compared with 255/70R17
SizeTallinHeightvs 255/70R17Widthvs 255/70R17At an indicated 60true mphCompare
235/75R1730.9−0.2 in−0.8 in59.758.8 to 60.6Compare →
265/65R1730.6−0.5 in+0.4 in59.058.2 to 59.9Compare →

About as tall, other wheels

About as tall, other wheels, compared with 255/70R17
SizeTallinHeightvs 255/70R17Widthvs 255/70R17At an indicated 60true mphCompare
255/65R1831.1±0.0 in±0.0 in60.059.1 to 60.9Compare →
255/55R2031.0±0.0 in±0.0 in60.059.1 to 60.9Compare →
31x10.50R1531.0−0.1 in+0.5 in59.959.0 to 60.8Compare →
275/60R1831.0−0.1 in+0.8 in59.959.0 to 60.8Compare →

04 / Next

Compare it with your size

Tire size calculator255/70R17 against 245/75R17, 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 tiresChevrolet Tahoe tiresStock tires and wheels by trim, and what bigger tires change on the Chevrolet Tahoe.See the tires

05 / FAQ

Questions people ask

What is 255/70R17 in inches?

About 31.1x10.0R17: 31.1 in tall and 10.0 in wide on a 17-inch wheel.

Which vehicles come with 255/70R17 tires?

In our data: Chevrolet Silverado 1500 (2019–2026), Chevrolet Tahoe (2015–2020), Ford Ranger (2024–2026) and Volkswagen Amarok (2023 and 2025).

How does 255/70R17 compare with the Chevrolet Silverado 1500’s other stock sizes?

255/70R17 is 2.1 in shorter: with a speedometer set for 275/70R18 it reads 6.8% high, 56.2 mph at an indicated 60. 255/70R17 is 1.9 in shorter: with a speedometer set for 275/60R20 it reads 6.2% high, 56.5 mph at an indicated 60. 255/70R17 is 1.0 in shorter: with a speedometer set for 275/65R18 it reads 3.3% high, 58.1 mph at an indicated 60.

What is the next size up from 255/70R17?

245/75R17: about 0.4 in taller and 0.4 in narrower. On a speedometer set for 255/70R17 it reads 1.3% low (60.8 mph at an indicated 60).