I've just put these on my Mercedes ML350 and managed to catch the first of the Scottish snow. So far I'm very impressed with all aspects of the tyres. In around 3cm of snow they were fantastic and gave me the assurance I'd decent rubber between me and the road. As the snow melted at the lower levels they were really good on the slush/rain and the drive was very comfortable. I fell the value and quality of these tyres is well worth this review, I'm sticking the WR D4 on my wife's C class next week let's hope they are as good as the latest WR SUV 3.
270/40 R21 Tyres
Everything we know about the 270/40 R21 tyre size: 1 owner reviews covering 500 miles of driving, and EU label data for the tyres you can actually buy in it.
- 1owner reviews
- 500 milescovered on them
What does 270/40 R21 mean?
A 270/40 R21 tyre is 270 mm wide, its sidewall is 40% of that width (108 mm) tall, and it fits a 21 inch wheel. That gives an overall diameter of roughly 749 mm.
| Section width | 270 mm |
|---|---|
| Sidewall height | 108 mm |
| Rim diameter | 21" (533 mm) |
| Overall diameter | ≈ 749 mm |
| Circumference | ≈ 2,354 mm |
| Revolutions per km | ≈ 425 |
| Revolutions per mile | ≈ 684 |
Also written as
270/40R21 270/40 ZR21 270-40-21 270 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.
What cars use 270/40 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 270/40 R21 tyres
The most recent owner reviews fitted in this size, in their own words.
Drive on 270/40 R21 tyres?
Review your tyres 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 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.