Had a major event today after one of these P Zeros burst its steel cables on a motorway and the tread separated. We escaped unharmed off the motorway but I’m not impressed and I’m going to take it up with Pirelli.
305/40 R20 Tires
Everything we know about the 305/40 R20 tire size: 2 owner reviews covering 47,000 miles of driving, and EU label data for the tires you can actually buy in it.
- 2owner reviews
- 47,000 milescovered on them
- 69tires made in this size
305/40 R20 EU tire label data
EU label values are declared for each individual size, so the figures here are exact for 305/40 R20 rather than a range across a model. 55 tires carry label data in this size. The most common load index is 112 (up to 1,120 kg per tire). 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). 19 tires in this size carry the 3PMSF severe snow marking.
A Best wet grip
19 tires in this size hold the top EU wet grip rating, class A. The highest scoring on Tire Reviews:
- Goodyear Eagle F1 Asymmetric 6 Summer 9.7
- Michelin CrossClimate 3 Sport All Season 9.6
- Michelin Pilot Sport 4 SUV Summer 9.3
- Kumho Ecsta Sport PS72 Summer 9.2
- Falken Azenis FK520 Summer 9.1
- Vredestein Ultrac Pro Summer 9
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:
- Continental VikingContact 8 Winter 9.2
- Pirelli P Zero Summer 8.8
69dB Quietest tires
The quietest 305/40 R20 tires are labelled at 69 dB external noise:
- Falken Azenis FK520 Summer 9.1
- Pirelli P Zero Summer 8.8
- Pirelli Scorpion Winter Winter 8.6
- Hankook Ventus S1 evo 3 SUV Summer 8.5
- Michelin X Ice Snow+ Winter 8.5
- Pirelli Scorpion Verde All Season All Season 4.9
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 305/40 R20 mean?
A 305/40 R20 tire is 305 mm wide, its sidewall is 40% of that width (122 mm) tall, and it fits a 20 inch wheel. That gives an overall diameter of roughly 752 mm.
| Section width | 305 mm |
|---|---|
| Sidewall height | 122 mm |
| Rim diameter | 20" (508 mm) |
| Overall diameter | ≈ 752 mm |
| Circumference | ≈ 2,362 mm |
| Revolutions per km | ≈ 423 |
| Revolutions per mile | ≈ 681 |
Also written as
305/40R20 305/40 ZR20 305-40-20 305 40 20
Figures are calculated from the nominal size. A loaded, rolling tire runs a few percent smaller, and true widths vary slightly between makes.
What cars use 305/40 R20 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 305/40 R20 tires
The most recent owner reviews fitted in this size, in their own words.
Drive on 305/40 R20 tires?
Review your tires and help the next driver choose. It takes about five minutes, and every review on this page came from a driver who took them.
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.