Rim or Wheel Diameter Wheel Diameter specifies the size, in inches, of the wheel that a tire fits.Bias-ply tires (which use a "B" for their description) are still used for certain truck applications. Prior to radial tires, most cars came with bias-ply tires, which had a crude construction that made for poor handling. (R) Internal Construction The "R" refers to radial construction, which has been the industry standard in passenger-car tires for more than 20 years.Lower numbers, like 55 or less, mean a short sidewall for improved steering response and better overall handling. The sidewall height of the example tire above is 60% of its section width.This number can be very indicative of a tire's purpose. Aspect Ratio Aspect Ratio is the ratio of the sidewall height to the section width.Generally speaking, the larger this number is, the wider the tire will be. The first number in this series refers to the tire's section width, or distance from sidewall edge to sidewall edge (in millimeters) when measured up and over the tire's tread. Tire / Section Width The tire numbers in the above example tell us that the tire is 185 millimeters wide.The last number, "14" indicates wheel diameter. The number "60" indicates the tire’s aspect ratio.
Atv tire aspect ratio calculator how to#
Nitto® Tire explains how to read these symbols and what they each mean.
The information found on a tire sidewall contains important information about the tire size, load capacity, weather ratings, and even government ratings for treadwear, traction and temperature.
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