Tire Size Calculator & Comparison

Your vehicle’s driveline and just about every system in your engine bay work towards one goal – to deliver the power produced by the engine to those small contact patches that grip the road, your tires. In fact, tires determine everything from the vehicle’s performance to your driving safety and comfort. That's why, when doing wheel and tire upgrades, nothing can be overlooked. To give you a hand with this, we’ve prepared these tire size calculators and tire size comparison calculators, which are sure to come in handy for you when you’re upgrading your wheels and tires.

You’ve probably noticed different letters and numbers on your tires’ sidewalls, such as 215/35R17 or 23x8.5R17. You might be aware of what they mean, which is tire width, the sidewall's section height to the tire's section width ratio, and the diameter of the wheel. But, does this data tell you a lot about the tire’s look and performance when you see them, for example, on the website? Our tire size calculator is designed to visualize the data, while providing some extra information, such as the tire circumference and the quantity of revolutions per mile.

The comparison of tire sizes is the most common problem a customer must deal with when deciding what non-stock size tire is the best fit for his or her vehicle. To save you lots of headaches and tons of time when choosing the right tire for your pride and joy, we have provided you with a powerful tool in the form of a tire comparison calculator. It takes the measurements of two selected tires and compares their dimensions, such as overall diameters, widths, and sidewall sizes, along with circumferences and revolutions per mile. The tire calculator makes it possible to physically see the difference between the tires on your screen, as if they were right in front of you. It also shows the speedometer error which will appear if you switch to tires with a larger than stock overall diameter.

While most countries use the metric system exclusively for tire sizing, some countries, including the United States, utilize inches for some tire measurements. If you’re used to one of the standards and have never dealt with the other, inches to metric tire conversion or vice versa can be a confusing and time-consuming task. Fortunately, you can do it in no time flat with the help of our tire size conversion calculator. All you need to do is to fill in the form with your tire dimensions, click on the convert button, and you're done. The calculator will instantly convert the data into the required standard and display it on the screen with the tire size visualizer. In addition, it will show a list of alternative tire sizes close to the requested one for your reference.

The aesthetic appeal and performance benefits of larger wheels are undeniable, which is why plus-sizing wheels is so popular today. However, when you move to a larger wheel size, you need new tires to match the upsized wheels, while maintaining the overall diameter of the factory wheel and tire setup within acceptable tolerances. That's why, before purchasing larger wheels, make sure you know the right tire size that will match the wheels and fit the vehicle. Our tire plus sizing calculator will be of great help to you, providing you with the exact tire specifications to fit your selected wheel size. All you need to do is fill in your existing tire measurements and the desired wheel size, and then click the convert button. The system will promptly show the right tire measurements in both metric and inches.