Available Tires. Size 2 - Alternate Tire Sizes. Use the tire calculator to populate a list of alternate tire sizes. Click on each size to see available tires in that size. Metric Tire Size Comparison Chart for Tire Comparison Charts by Diameter 21" 22" 23" 24" 25" 26" 27" 28" 29" 30" 31" 32" 33" 34" 35" 36" 37" 38" 39" 40" ".
Tire Size Tools. Tire Categories. Popular Sizes. This number is based on the weight the tire can safely carry. If there is a "P" on the sidewall, it stands for "passenger car. P-metric method of tire sizing. It's the height of the sidewall measured from wheel rim to top of the tread, expressed as a percentage of tire width.
In other words, it's sidewall height divided by tire width. As a general rule of thumb, it's safe to fit a tire up to 20 millimeters wider than stock on the original rim. The actual width of the tire will vary depending on the width of the rim: The tire will expand 5 millimeters for every half inch R indicates the construction used within the tires casing.
R stands for radial construction. B means belted bias and D stands for diagonal bias construction. These numbers or letters are branded on the side of a tire's sidewall and they identify how much load the tire can safely carry at a specified inflation pressure. Here's why it can be confusing: A modern tire with a ply rating doesn't necessarily have 10 actual plies in it. The D is the designation for the internal construction of the tire. The D stands for diagonal or bias ply construction. That means the tire body plies inside the tire will crisscross.
Choose the tire size for comparison with your stock tire size and click on 'Compare Selected Sizes' for immediate results. None of the three numbers mean anything without the other two.
The tire size comparison calculator on tiresize. All you need to do is enter two metric or standard tire sizes and click on the 'Compare' button. If you're looking for tires different to stock size, the calculator includes an additional useful tool. It displays examples of speedometer readings using the first tire, and the real speed you'd be going if you fitted the second tire.
Tire technology is always evolving, but your tires will always be among the most important components on your car. For any feedback or correction requests please contact us at research caranddriver.
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