Wheel size
The wheel size is the diameter of the wheel in inches where the beads of the tire seat on the wheel. This measurement does not include the rim flange. Modern road tires have several measurements associated with their size as specified by tire codes like 225/70R14. The first number in the code “225″ represents the nominal tire width in millimeters, this is followed by the aspect ratio “70″ which is the height of the side wall expressed as a percentage of the nominal width. R stands for radial and relates to the tire construction. The final number in the code “14″ is the rim size measured in inches. It should be noted that the overall circumference of the tire will increase by increasing any of the tires specifications.
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