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275/40 R21 Tires

Everything we know about the 275/40 R21 tire size: 6 owner reviews covering 54,000 miles of driving, and EU label data for the tires you can actually buy in it.

  • 6owner reviews
  • 54,000 milescovered on them
  • 162tires made in this size
275/40 R21 To scale, mm
Ø 753 275 110 21" 110

275/40 R21 EU tire label data

EU label values are declared for each individual size, so the figures here are exact for 275/40 R21 rather than a range across a model. 132 tires carry label data in this size. The most common load index is 107 (up to 975 kg per tire). Speed ratings on offer: Y (300 km/h), W (270 km/h), V (240 km/h), H (210 km/h), T (190 km/h), Q (160 km/h). 56 tires in this size carry the 3PMSF severe snow marking.

A Best wet grip

43 tires in this size hold the top EU wet grip rating, class A. The highest scoring on Tire Reviews:

A Lowest rolling resistance

The most fuel efficient choice: 9 tires in this size reach rolling resistance class A. The highest scoring on Tire Reviews:

68dB Quietest tires

The quietest 275/40 R21 tires are labelled at 68 dB external noise:

Label values come from the EU EPREL database and apply to the EU market versions of each tire. Wet grip and rolling resistance run from class A (best) to E; noise is the measured drive-by figure. A good label is a floor, not a verdict - the tests and owner ratings above tell you far more.

What does 275/40 R21 mean?

A 275/40 R21 tire is 275 mm wide, its sidewall is 40% of that width (110 mm) tall, and it fits a 21 inch wheel. That gives an overall diameter of roughly 753 mm.

275/40 R21 nominal dimensions
Section width275 mm
Sidewall height110 mm
Rim diameter21" (533 mm)
Overall diameter≈ 753 mm
Circumference≈ 2,367 mm
Revolutions per km≈ 422
Revolutions per mile≈ 680

Also written as

275/40R21 275/40 ZR21 275-40-21 275 40 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 275/40 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 275/40 R21 tires

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

67%
Pirelli P Zero 275/40 R21 BMW X6 M 10,000 miles July 27, 2025
The tire has a very good dry grip but not that good on weat road, overall i like the tire but its noisy and not comfortable too much sporty
91%
Pirelli Scorpion Verde All Season 275/40 R21 Volvo XC90 B5 4,000 miles January 9, 2025
I fitted the Pirelli Scorpion Verde All Season's to my Volvo XC90 as Michelin CrossClimate's weren't available in the size. I live in rurally in Northeast Scotland, where we often get snow from November - March.
My last Volvo XC90 had 17" wheels, and I was able to put CrossClimates on it, but my driveway is at an angle, and as I reverse up it, I also need to turn. No vehicle has managed this when it's has 2+ inches of snow (including previous Skoda Superb 4x4 with the CC's). My current Volvo with the Pirelli Scorpion Verde All Season has managed to reverse up the driveway each and every time.
The car and tires were able to easily travel at 40mph on the snow this morning, met another vehicle coming the opposite direction on a single lane road, I was able to easily stop without any skidding/sliding, reverse back to a passing place, and pull out again once the vehicle passed without issue. Other day, it also easily got up to 50mph on a snow covered single track hill road on the way home, with no loss of grip, also stopped well (was testing to see how good they were!).
The Pirelli Scorpion Verde All Season doesn't grip as well in wet weather no the bends, but to be fair the XC90 isn't designed for spirited driving, in the rain, around B road bends!
89%
Hankook Ventus S1 evo 3 SUV 275/40 R21 BMW X5 10,000 miles March 8, 2023
Fantastic tire. I have had these on since new and have just gone past 15k kilometers. In terms of brands I have run a variety of Pirelli, Michelin and others on various SUV's in the past and these are the best all rounder I've had. Plenty of wear currently left on them and I will be buying another set when the time comes.

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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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