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255/85 R17 Tyres

Everything we know about the 255/85 R17 tyre size: 1 owner reviews covering 22 miles of driving, and EU label data for the tyres you can actually buy in it.

  • 1owner reviews
  • 22 milescovered on them
255/85 R17 To scale, mm
Ø 865 255 217 17" 217

What does 255/85 R17 mean?

A 255/85 R17 tyre is 255 mm wide, its sidewall is 85% of that width (217 mm) tall, and it fits a 17 inch wheel. That gives an overall diameter of roughly 865 mm.

Section width255 mm
Sidewall height217 mm
Rim diameter17" (432 mm)
Overall diameter≈ 865 mm
Circumference≈ 2,718 mm
Revolutions per km≈ 368
Revolutions per mile≈ 592

Also written as

255/85R17 255/85 ZR17 255-85-17 255 85 17

Figures are calculated from the nominal size. A loaded, rolling tyre runs a few percent smaller, and true widths vary slightly between makes.

Comparing two sizes? Use the tyre size calculator →

What cars use 255/85 R17 tyres?

The cars most often running this size in our owner reviews. Each links to the best rated tyres for that exact car.

Toyota Tundra 1 reviews in this size

What drivers say about their 255/85 R17 tyres

The most recent owner reviews fitted in this size, in their own words.

84%
Mickey Thompson Baja Boss AT 255/85 R17 Toyota Tundra 22 miles November 16, 2025
Unicorn all terrain tire. Don’t expect it to handle on road like a dedicated road tire, but for how aggressive and capable these are off-road and in every condition I’ve put them through, you have to compromise somewhere. Even then, they’re about as good on handling and comfort as most AT tires I’ve used that did t compare anywhere near the level these do off-road or in adverse onroad situations in harsh weather. I did a 20k mi review on my YouTube channel here: Brutally Honest Mickey Thompson Baja Boss A/T Review @ 20K Hard Miles
https://youtu.be/TY-w15sKQhw

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Where this data comes from

Owner ratings are submitted through the review form on this site, naming the tyre, the size and the distance covered, and are checked by hand before publication. Test results come from independent published tyre tests indexed by size, and label values from the EU EPREL database.

About the TR Score

The Tyre Reviews Score rates each tyre out of 10 using independent test results and the full body of owner reviews, so you can check a car-specific ranking against the wider evidence.

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Who does the testing

Every test published as a Tyre Reviews test is run by Jonathan Benson, who has been testing tyres independently since 2007.

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