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185/40 R16 Tires

Everything we know about the 185/40 R16 tire size: 1 owner reviews covering 4,000 miles of driving, and EU label data for the tires you can actually buy in it.

  • 1owner reviews
  • 4,000 milescovered on them
185/40 R16 To scale, mm
Ø 554 185 74 16" 74

What does 185/40 R16 mean?

A 185/40 R16 tire is 185 mm wide, its sidewall is 40% of that width (74 mm) tall, and it fits a 16 inch wheel. That gives an overall diameter of roughly 554 mm.

Section width185 mm
Sidewall height74 mm
Rim diameter16" (406 mm)
Overall diameter≈ 554 mm
Circumference≈ 1,742 mm
Revolutions per km≈ 574
Revolutions per mile≈ 924

Also written as

185/40R16 185/40 ZR16 185-40-16 185 40 16

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 185/40 R16 tires?

The cars most often running this size in our owner reviews. Each links to the best rated tires for that exact car.

Mazda 3 Series 1 reviews in this size

What drivers say about their 185/40 R16 tires

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

51%
Yokohama S306 185/40 R16 Mazda 3 Series 4,000 miles August 2, 2011
I've tried Continental, Michellin Energy Saver, Avon ZV3. They came with the Mazda3, I bought second hand from the dealership recently. Absolutely fine in the dry, even at high speed.
But I would go as far to say - UNSAFE in the slightest hint of wet, when cornering on roundabouts. They wheel spin at 2000rpm in the wet and slide like crazy on a dual carriageway roundabout (40mph). Anything above 25mph and you are stuffed.
They seem to wear pretty well, I've done 4000miles.

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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.

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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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