They are explained in a section below. I hope you can help with this one, because it has got me baffled. Two versions of numeric tire sizes were used as Original Equipment on vehicles between 1949 and 1970. Load index. However,… The Metric Tire Conversion Calculator converts metric tire sizes (ie 285/75R16) to standard tire sizes (ie 31x10.50R15) and standard tires back to metric. …tire sizes created with the new load formula. Calculate the overall diameter of metric and inch tire sizes and view the results with our tire visualizer. Standard, Radial, and Metric Tractor Tire Sizes. Radial Size. Motorcycle Street Tire Size Conversion Chart Front Tires Rear Tires Metric Alpha Inch Metric Alpha Inch 80/90 MH90 2.50/2.75 110/90 MP85 4.50/4.75 Euro-metric sizes were developed over time based on load and dimensional… It is one of the first volume-produced low-profile tires. Tire Construction Differences. Metric Radial Size . The use of P-metric sizes began in the late 1970s and they are the most frequently used type of tire size today. This formula is a quick way to get the tire diameter of those metric tires that are common on just about everything stock. Using metric dimensions to reflect a tire's width actually began in Europe in the late 60s. 225/50R16 92S If there isn't a letter preceding the three-digit numeric portion of a tire size, it signifies the tire is a "Metric" size (also called "Euro-metric" because these sizes originated in Europe). Supports tire sizes in metric and inches. These sizes are known as hard-metric or Euro-metric size tires. Euro-metric sized tires do not have the P at the beginning of the size, 225/45-17 for example. Vintage Tire Size Conversion Chart Use the following chart to figure out the closest modern tire size to your car's original tires. with the new tires, your vehicle will actually be traveling at , which is than the original tires. For example P, LT, T, and ST. P. When we use tire type “P” or P-Metric, it means that the tire is made according to certain standards of the United States (drafted by TRA) for passenger vehicles. April 2018 at 19:09. Passenger tires that are designed based on the European Tyre and Rim Technical Organization’s (ETRTO) standard start without any letters. Tire Size Chart - Metric - by Overall Tire Diameter displays the metric tire size designations with belonging tire measures, in metric and English units: OD - Overall Tire Diameter, SW - Section width, AR - Aspect Ratio, RD - Rim diameter, SH - Section height, CI - Tire circumference, RE - Revolutions per mile/km.. Use the following chart to figure out the closest modern tire size to your car's original tires. This chart has been developed to help you determine their equivalent Euro-metric and P-metric tire sizes. It looks like your 5.20-13 tire has an overall diameter of 23.10 inches and a section width of 6 inches. The sizes in the above chart do not go as large as modern sizes (180/55 or 240/40) because new bikes are not made to use the Inch Format.. Tractor tire sizes can be written in many different ways, and can become very confusing to consumers. Goodyear has a large tire catalog complete with all-season tires, winter tires, sport performance tires, and more. Most passenger car tires today are “metric” or “P-metric” (similar, with … Common Tire Sizes. Find your tire size within the chart below to see a selection that's right for you. Tire Height in Inches Enter any three of the numbers into this form to solve for the fourth. The first number, in the illustration “185,” is the nominal width of the tire in millimeters, from sidewall to sidewall, when it is properly mounted on a wheel and inflated but not supporting a car. Use the table below to help you find radial tire size equivalents and metric … A handy guide to compare modern and antique tire sizes. The Michelin TRX, (and the related TDX), is a radial tire introduced by the Michelin Group in 1975. 35 is the tire diameter, or height, in inches. Joseph 20. 27" (ISO size 630) is an older size that was used for road bikes, but since so many bikes were built with this size, it is still readily available. Tire Height Calculator. If you want to do a side-by-side comparison of two different tire sizes, simply enter your current tire size, followed by the new tire size. Metric to Standard Tire Conversion Chart for 15 inch Wheels; Metric Standard; 215/75/15: 27.7"x 8.5" 225/70/15: 27.4"x 8.9" 225/75/15: 28.3"x 8.9" 235/75/15: 29.0"x 9.3" 245/75/15: 29.5"x 9.6" 255/75/15: 30.0"x 10.0" 265/75/15: 30.6"x 10.4" Tires Comparison Chart Agricultural Tire Metric Conversion Motorcycle tire guide 101 and faq revzilla metric to imperial tire conversion tyre size tire sizes motorcycle chart motorcycle conversion chart standard. 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