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To measure a bicycle wheel, start by standing the bike upright by leaning it against a wall or using the kickstand. Then, use a tape measure to measure the distance from the ground underneath the tire to the center of the wheel to get the radius. Next, multiple the radius by 2 to get the diameter. For example, if you measure 14 inches from the ground to the center, the diameter is 28 inches. Finally, measure the flat part of the tire across the treads to find the width measurement. To learn how to find the circumference of your bicycle wheel so you can calibrate your speedometer or GPS, read on!
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