Continental SSR3s on a 2013 BMW 520D M Sport, Rear runflats lasted 13500 miles with careful driving. Front wear lo but new shuddering ate motorway speeds. fronts been off and balanced and still as bad, tracking is perfect as done by a hi performance local company that does all expensive motors as it was not set up from BMW new when I got it. Wet grip on SS3s scary.. Driven for 30 plus years. Getting rid and going to non runflats. Beautiful car ruined by badly wearing runflats. 245 45 18 front and 275 40 18 rears.... Drives very straight and quick in dry, corners fantastic, grip is amazing,,, but when it rains... slow down to micra speed. Its so bad I don't like my wife driving it in wet greasy roads... My 120D has Turanza ER300 runflats and is so good in the rain !!!!!!! moving to Goodtyear Eagle Assy 3 as recommended by a local hi performance workshop.
270/40 R18 Tires
Everything we know about the 270/40 R18 tire size: 1 owner reviews covering 14,000 miles of driving, and EU label data for the tires you can actually buy in it.
- 1owner reviews
- 14,000 milescovered on them
What does 270/40 R18 mean?
A 270/40 R18 tire is 270 mm wide, its sidewall is 40% of that width (108 mm) tall, and it fits a 18 inch wheel. That gives an overall diameter of roughly 673 mm.
| Section width | 270 mm |
|---|---|
| Sidewall height | 108 mm |
| Rim diameter | 18" (457 mm) |
| Overall diameter | ≈ 673 mm |
| Circumference | ≈ 2,115 mm |
| Revolutions per km | ≈ 473 |
| Revolutions per mile | ≈ 761 |
Also written as
270/40R18 270/40 ZR18 270-40-18 270 40 18
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 270/40 R18 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 270/40 R18 tires
The most recent owner reviews fitted in this size, in their own words.
Drive on 270/40 R18 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.