What tire size should I use?

It’s vital to drive the right tire size. Driving tires with the wrong dimensions could cause your vehicle to underperform, handle poorly or experience uneven tire wear that can make driving dangerous.

As a global leader in safety, Nokian Tyres offers tools to help you determine the right tire size for your vehicle. While you should always consult your owner manual or the sticker on your driver door, the Nokian Tyres website has a tire selector tool that enables you to search for the right tires and available tire sizes for your vehicle.

How do you decode your tire’s size? Let’s say you drive tires with a size rating of 215/65R18. Here’s what each of those things mean:

  • 215 is the width of the tire in millimeters

  • 65 is the tire’s aspect ratio – the height of its sidewall divided by its width

  • R stands for the radial construction type – the vast majority of tires on the road today are radial tires

  • 18 is the tire’s wheel diameter in inches

If you’re still unclear about which tire size to use or think you might have gotten it wrong, visit our Dealer Locator to find a nearby tire shop that can help. While you evaluate your tire size, consider whether you’re driving the right tires for your climate – winter tires are the safest option in snow and ice, all season tires are meant for temperatures above 45 degrees, and all weather tires provide a year-round solution, since they’re rated for winter use but suitable to use in all conditions.

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