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315/35 R21 Tyres

Everything we know about the 315/35 R21 tyre size: 1 owner reviews covering 31,000 miles of driving, and EU label data for the tyres you can actually buy in it.

  • 1owner reviews
  • 31,000 milescovered on them
  • 92tyres made in this size
315/35 R21 To scale, mm
Ø 754 315 110 21" 110

315/35 R21 EU tyre label data

EU label values are declared for each individual size, so the figures here are exact for 315/35 R21 rather than a range across a model. 81 tyres carry label data in this size. The most common load index is 111 (up to 1,090 kg per tyre). Speed ratings on offer: (Y) (301 km/h), Y (300 km/h), W (270 km/h), V (240 km/h), H (210 km/h), T (190 km/h), Q (160 km/h). 30 tyres in this size carry the 3PMSF severe snow marking.

A Best wet grip

28 tyres in this size hold the top EU wet grip rating, class A. The highest scoring on Tyre Reviews:

A Lowest rolling resistance

The most fuel efficient choice: 2 tyres in this size reach rolling resistance class A. The highest scoring on Tyre Reviews:

69dB Quietest tyres

The quietest 315/35 R21 tyres are labelled at 69 dB external noise:

Label values come from the EU EPREL database and apply to the EU market versions of each tyre. 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 315/35 R21 mean?

A 315/35 R21 tyre is 315 mm wide, its sidewall is 35% of that width (110 mm) tall, and it fits a 21 inch wheel. That gives an overall diameter of roughly 754 mm.

315/35 R21 nominal dimensions
Section width315 mm
Sidewall height110 mm
Rim diameter21" (533 mm)
Overall diameter≈ 754 mm
Circumference≈ 2,368 mm
Revolutions per km≈ 422
Revolutions per mile≈ 679

Also written as

315/35R21 315/35 ZR21 315-35-21 315 35 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 315/35 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 315/35 R21 tyres

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

57%
Pirelli P Zero Runflat 315/35 R21 BMW X5 31,000 miles December 26, 2022
This is second set of Pirelli tires that I have owned. Pirelli tires (in my opinion) are awful. Last pair would not balance or hold balance after the dealer replaced all 4 tires and performed multiple balance, now I have my second set that came with my 2022 BMW and the tires are bad after 30K miles of mild driving mix of highway and city. 4 tires and they have all different wear levels. How is that even possible. Will never by Pirelli's again. The brand is awful. I would pay more for Michelin. I road race motorcycles as well and my friends that run Pirelli's only run the once, they they flip to Michelin. I do not know how Pirelli is still in business as they have an inferior product (IMHO).

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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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