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185/50 R18 Tyres

Everything we know about the 185/50 R18 tyre size: 1 owner reviews covering 3,000 miles of driving, and EU label data for the tyres you can actually buy in it.

  • 1owner reviews
  • 3,000 milescovered on them
185/50 R18 To scale, mm
Ø 642 185 93 18" 93

What does 185/50 R18 mean?

A 185/50 R18 tyre is 185 mm wide, its sidewall is 50% of that width (93 mm) tall, and it fits a 18 inch wheel. That gives an overall diameter of roughly 642 mm.

Section width185 mm
Sidewall height93 mm
Rim diameter18" (457 mm)
Overall diameter≈ 642 mm
Circumference≈ 2,018 mm
Revolutions per km≈ 496
Revolutions per mile≈ 798

Also written as

185/50R18 185/50 ZR18 185-50-18 185 50 18

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 185/50 R18 tyres?

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

Skoda Superb MK3 (2015 Present) 1 reviews in this size

What drivers say about their 185/50 R18 tyres

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

90%
Michelin Primacy 4+ 185/50 R18 Skoda Superb MK3 (2015 Present) 3,000 miles March 20, 2025
Update on the Michelin Primacy 4+

I turned all the electronic driving aids of on my car and everything improved all round on my Skoda.
The car felt more sure footed and planted on the road and the steering feel was transformed.

Electronic driving aids have a use but it's up to each driver to judge the benefit of not.

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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.

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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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