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195/40 R21 Tyres

Everything we know about the 195/40 R21 tyre size: 1 owner reviews covering 10,000 miles of driving, and EU label data for the tyres you can actually buy in it.

  • 1owner reviews
  • 10,000 milescovered on them
195/40 R21 To scale, mm
Ø 689 195 78 21" 78

What does 195/40 R21 mean?

A 195/40 R21 tyre is 195 mm wide, its sidewall is 40% of that width (78 mm) tall, and it fits a 21 inch wheel. That gives an overall diameter of roughly 689 mm.

195/40 R21 nominal dimensions
Section width195 mm
Sidewall height78 mm
Rim diameter21" (533 mm)
Overall diameter≈ 689 mm
Circumference≈ 2,166 mm
Revolutions per km≈ 462
Revolutions per mile≈ 743

Also written as

195/40R21 195/40 ZR21 195-40-21 195 40 21

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 195/40 R21 tyres?

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

What drivers say about their 195/40 R21 tyres

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

64%
Pirelli PZero Nero 195/40 R21 Mercedes Benz GL63 10,000 miles September 3, 2017
!!! Never get these tyres. Pirelli is fooling on customers. Tyres are easily worn away without spending even 10000 miles. So be attentive to that fact. Replaced them to Continental newly. Let's see what happens.

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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.

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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