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225/35 R21 Tires

Everything we know about the 225/35 R21 tire size: 1 owner reviews covering 10 miles of driving, and EU label data for the tires you can actually buy in it.

  • 1owner reviews
  • 10 milescovered on them
225/35 R21 To scale, mm
Ø 691 225 79 21" 79

What does 225/35 R21 mean?

A 225/35 R21 tire is 225 mm wide, its sidewall is 35% of that width (79 mm) tall, and it fits a 21 inch wheel. That gives an overall diameter of roughly 691 mm.

225/35 R21 nominal dimensions
Section width225 mm
Sidewall height79 mm
Rim diameter21" (533 mm)
Overall diameter≈ 691 mm
Circumference≈ 2,171 mm
Revolutions per km≈ 461
Revolutions per mile≈ 741

Also written as

225/35R21 225/35 ZR21 225-35-21 225 35 21

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 225/35 R21 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 225/35 R21 tires

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

56%
Pirelli P Zero 225/35 R21 Audi S7 10 miles October 9, 2025
Had 2 sets of Pirelli P0 tires on my Audi S7. Tread wear is very high. Only managed 15,000 miles for each set with regular ("non-spirited") driving. Dry grip is impressive but they are very hard, uncomfortable tires. Also after 10,000 miles on the second set I've literally had pieces of rubber (3" x 0.5" x 0.25" thick) detaching from the tire walls on 3 out of 4 tires. Pirelli totally ignored my attempts to discuss warranty issues. I really can't recommend these Pirelli tires. Moving on, I've just ordered a set of Continental Extreme Contact DWS 06 plus as my next tires. I'll let you know what I think.

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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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