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1. Locate the tire size on the sidewall of the tire, and write it down. The size will appear as a series of numbers, letters and slashes---for example, "225/60R16." You
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1. Locate the digital photo you want to resize, viewing it in the relevant documents folder on your PC. Right-click on the file name or thumbnail, selecting "Open With"
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1. Obtain the tire diameter of your new tires. If you purchased 27-inch tires, the diameter is 27. 2. Calculate the RPM (revolutions per minute) using the following formula: RPM =
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