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305/70 R18 Tires

Everything we know about the 305/70 R18 tire size: 1 owner reviews covering 20,000 miles of driving, and EU label data for the tires you can actually buy in it.

  • 1owner reviews
  • 20,000 milescovered on them
  • 6tires made in this size
305/70 R18 To scale, mm
Ø 884 305 214 18" 214

What does 305/70 R18 mean?

A 305/70 R18 tire is 305 mm wide, its sidewall is 70% of that width (214 mm) tall, and it fits a 18 inch wheel. That gives an overall diameter of roughly 884 mm.

305/70 R18 nominal dimensions
Section width305 mm
Sidewall height214 mm
Rim diameter18" (457 mm)
Overall diameter≈ 884 mm
Circumference≈ 2,778 mm
Revolutions per km≈ 360
Revolutions per mile≈ 579

Also written as

305/70R18 305/70 ZR18 305-70-18 305 70 18

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

Comparing two sizes? Use the tire size calculator →

What cars use 305/70 R18 tires?

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

What drivers say about their 305/70 R18 tires

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

94%
Toyo Open Country AT III 305/70 R18 Chevrolet Tahoe 20,000 miles December 11, 2025
Quality tire that has lasted through a lot of miles and off road use. I have a variant size that is the Toyo extreme version and they are the best tire I have come across for all types of use on a 4x4. Wish they made this version in larger sizes. Still running strong minimal wear!

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Where this data comes from

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

About the TR Score

The Tire Reviews Score rates each tire 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.

Who does the testing

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

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