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285/50 R21 Tires

Everything we know about the 285/50 R21 tire size: 1 owner reviews covering 18,000 miles of driving, and EU label data for the tires you can actually buy in it.

  • 1owner reviews
  • 18,000 milescovered on them
  • 2tires made in this size
285/50 R21 To scale, mm
Ø 818 285 143 21" 143

285/50 R21 EU tire label data

EU label values are declared for each individual size, so the figures here are exact for 285/50 R21 rather than a range across a model. 2 tires carry label data in this size. The most common load index is 115 (up to 1,215 kg per tire). Speed ratings on offer: W (270 km/h).

A Best wet grip

1 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: 2 tires in this size reach rolling resistance class A. The highest scoring on Tire Reviews:

69dB Quietest tires

The quietest 285/50 R21 tires are labelled at 69 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 285/50 R21 mean?

A 285/50 R21 tire is 285 mm wide, its sidewall is 50% of that width (143 mm) tall, and it fits a 21 inch wheel. That gives an overall diameter of roughly 818 mm.

285/50 R21 nominal dimensions
Section width285 mm
Sidewall height143 mm
Rim diameter21" (533 mm)
Overall diameter≈ 818 mm
Circumference≈ 2,571 mm
Revolutions per km≈ 389
Revolutions per mile≈ 626

Also written as

285/50R21 285/50 ZR21 285-50-21 285 50 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 285/50 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 285/50 R21 tires

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

60%
Pirelli P Zero 285/50 R21 Audi Q7 18,000 miles October 11, 2025
Dry grip is good as long as the surface is good and it is reasonably warm. Most of the roads i drive are backroads, seldomly smooth and are undulating. Even when dry and warm, the grip and balance could be significantly better. In fairness, on dual carriageways, motorways and even decent A roads the dry handling is good and dry braking is controlled and predictable.

Wet grip, however, is not good. Neither is wet braking. Also, susceptible to aquaplaning.

Winter driving is very poor. Grip is poor, braking is terrible. The tires feel totally inadequate for winter driving even when there is no snow or ice. They certainly don’t impart any confidence.

Wear is reasonable although the front tires did wear faster than expected. Rolling resistance seems good. Comfort (and grip, balance and control) depends on road type. It is good on A roads, dual carriageways but sometimes seems to scrabble for grip on bumpy roads and comfort is affected.

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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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