### a tire has an aspect ratio of 70

If a tire has an aspect ratio of 70, it means the tires height is 70% of its width. 40: This two-digit number is the aspect ratio, or profile, of the sidewall. Tire Diameter = Wheel Diameter + 2 Section Height. Section Width: In this case it is 185. In a tire with an aspect ratio of 85, for Some manufacturers will insert a Z in the middle of the tire size description (right after the aspect ratio) when the tire is rated at W or Y. And if a tire is rated in excess of Breaking that out, the 'P' stands for passenger tire and this may also read LT (for light truck) on some tires. The Aspect Ratio is stamped onto the exposed sidewall of any tire alongside a bunch of numbers and letters that tell you everything you need to know about your tire. The aspect ratio Aspect Ratio is a critical component of the tyre size. Once you have the standing height of the old tire, you must then match it on the new tire: Multiply the width by the aspect ratio expressed as a decimal (225 x 0.55 = 123.75). A tire aspect ratio is a number that denotes how high your tire profile is, i.e.

(e.g. What Length to Width Ratio Is Ideal. Aspect Ratio. Most of the bias ply tires offer an aspect ratio of around 80 or 90 percent. Metric tire sizes are a bit demanding when it comes to understanding what size they really are. Tire Size Chart Width of the tire. If replacing a FR70-14, you would look up the appropriate 70-series size, the 215/70R14. In our example, the width is 205 millimeters. Also known as series and profile. Both arent in the commonly used imperial standard of inches. tire width: length: inch (in) and millimeter (mm) The tires section width , tread width or overall width. This gear ratio and tire diameter chart is meant to give you an approximation of ideal RPMs at highway speed (65 mph) for three situations: fuel economy, every day driving and increased Metric to Standard Tire Conversion Chart for 20 inch Wheels; Metric Standard; 325/50/20: 33.0"x 13.2" Shop Jeep Tires. Convert the aspect height to inches (123.75 / 25.4 = 4.87). The aspect ratio is the percentage that compares the tires section height with the tires section width. In this case you will have a set of number in this manner: 100/90 19. Just by looking at the tire youll know that its 225 mm wide, with an aspect ratio of 45, with a rim diameter of 19 inches.It also has a The smaller the number the lower profile of the tire. In short, Metric measurement takes either the Width/aspect ratio-rim size format or Width/aspect ratio-speed rating-Tire Construction-Rim size format.

To determine the aspect ratio of the same P255/50VR16 The two-digit number after the slash mark in a tire size is the aspect ratio. But many of us wonder how low a tires aspect ratio can go before we hit the point of diminishing return. Then take the inches and multiply by two and add the rim size. A code of U means this tire will fit on a rim that is between 2.75 and 3.50 inches wide. 295/75R16 tires have a section width of 295 millimeters, a 75% aspect ratio, and fit 16-inch rims. Aspect Ratio: A nominal number, which represents the section height, divided by the section width and expressed as a percentage. Finally, like the first set of numbers, that R15 means it is a radial tire and has a 15" diameter. The aspect ratio is important to You can also check out our tire size calculator, wheel offset calculator, tire height calculator and tire comparison calculator. TreadwearTractionTemperature This percentage represents the ratio of sidewalls section height to the tires section width. Here's a formula you can use to calculate your vehicle's tire diameter: (CROSS SECTION WIDTH x 0.ASPECT RATIO x 2 25.4) + WHEEL DIAMETER = OVERALL TIRE DIAMETER For Example: 235/45ZR-1 (235 x 0.45 x 2 25.4) + 17 = 25.327" And here's a formula that you can use to calculate your vehicle's rear axle gear ratio: Following the three digits identifying the tire's Section Width in millimeters is a two-digit number that identifies the tire's profile or aspect ratio.