That 75 is the tire's aspect ratio and simply means the tire's height is equal to 75 percent of its width. From left to right, the P indicates a passenger tire while 265 indicates the tires width in millimeters. Also known as aspect ratio it indicates the ratio from the sidewall to the width eg 45 indicates the tyre height is. The second listing is a metric set up, and is what is more common on factory-type sized tires. It is measured when the tyre is inflated at its maximum air pressure, placed on the right rim, and is under no weight load.
You can ascertain it by dividing the section height by the section width. That third reading is the tire type as radial and diameter as 17". The aspect ratio of a tyre is simply the height of the sidewall in relation to the width of the tyre, represented as a percentage. That first number is your tire size at 35", and then the second number tells you the tire width at 12.5". If it is the first listing, then here is the breakdown. For example, it could simply say 35x12.5 R17, or it may show as P265 75 R15. You can also compare wheels and tyres, by entering a second set of wheel and tyre. Our calculator can tell you how a new tyre would effect your ride height, if a larger wheel would fit in your wheel arches, and so on. Here, R represents the Radial contruction of the tyre. Calculate and compare dimensions of wheels and tyres, to make sure theyre a good fit. Now, this information could read in a few different ways. Here, an aspect ratio of 55 indicates that the section height of the tyre is 55 of the section width of the tyre. The RPM calculator should be used as a guideline for comparative purposes only. You can try various combinations to come up with an appropriate combination of ring and pinion gear ratio and tire diameter for your vehicle. All tires are required to have this information, regardless of the manufacturer brand name. Use the RPM calculator to determine what RPM your engine will run based on gear ratio, tire diameter, transmission and MPH. Tire Diameter 2(Tire Width/25.4)(Aspect Ratio/100)-(Wheel Size-1) Tire Diameter Definition The Tire Diameter Calculator will instantly calculate the diameter of a tire if you enter in the tire width (in millimeters), the tire aspect ratio (also known as the tire series), and the wheel size (in inches). So here is some helpful information to assist you in determining what you currently have on the vehicle.įirst, the sidewall of your tire contains all the information needed to understand everything about that specific tire. Some quick math tells us that 60 of 265 millimeters is 159 millimeters. In this case, the tire height is 60 of its width.
TYRE ASPECT RATIO CALCULATOR DRIVER
And while a stock tire size is imprinted right inside the driver side B pillar, you may not know what if have if you are not the original owner. Aspect Ratio As we’ve mentioned, the aspect ratio is the sidewall height compared to its width. Knowing your Jeep's tire size can be essential information when it comes time to replace that rubber, or even if you ever decide to change wheels.
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