A tire size conversion calculator or tire diameter calculator is the best way to get the answers you are looking for when it comes to tire sizes. Our easy to use tire diameter calculators will always be useful at one time or another. Therefore you are actually traveling faster than your speedometer says when you have larger tires than stock, and slower than you're speedometer says if you have smaller tires. A speedometer reads the amount of revolutions your tires are making, not how far you are traveling. A bigger tire has a larger circumference, thus traveling a further distance for each revolution. This is valuable if you plan to or are already running bigger tires than stock, and want to know the speed you are actually traveling compared to you're speedometer reading. A very useful tire calculator when searching for tires that are a different size than stock.Īnother tire size calculator we have is our speedometer correction calculator. Then as a bonus it shows examples of your speedometer reading with the first tire, and the actual speed you're traveling if you were to install the second tire. The tire size comparison calculator takes the measurements of two tires and compares the diameter, width, sidewall, circumference, and revolutions per mile. There are more possibilities and choices in metric tires so the use of a tire size calculator can be very useful. Just fill in the inch measurements you are looking for and it will populate suggested tire sizes that are with in one inch bigger and smaller of the entered inch tire size. It also solves the problem of deciding what tire you would like to run if you have inch tire measurement in mind but can't find a company that manufactures that inch tire size. Just type in any tire size and click calculate. Our tire calculator makes this happen for you. The sidewall height or 'aspect ratio' of a 285/75/R16 tire is 75% of 285mm. The sidewall height is a percentage of the width of the tire. The second number on a metric tire is to calculate the side wall measurement. The sidewall or aspect ratio are used in metric tire sizes to determine the overall height of a tire. The third number generally preceded by an 'R' is the wheel diameter. Divide this number by 25.4 to get the inch equivalent as there is 25.4 mm in 1 inch. The first number on a metric tire is the width in millimeters. Inch measurement tires are fairly easy to understand however metric tires use a more difficult system to read. Just type in a metric or standard size tire and click calculate. Use our tire size calculator to calculate the diameter, width, sidewall, circumference, and revolutions per mile of any tire.

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