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from sidewall edge to sidewall edge. In general, the larger the number, the wider
the tire.
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ratio of height to width. Numbers of 70 or lower indicate a short sidewall for
improved steering response and better overall handling on dry pavement.
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standard for the past 20 years.
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you change your wheel size, you will have to purchase new tires to match the new
wheel diameter.
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information in your owner’s manual. If not, contact a local tire dealer. Note: You
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snow capability.
Speed Rating: The speed rating denotes the speed at which a tire is designed to be
driven for extended periods of time. The ratings range from 99 miles per hour
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information on all tires because it is not required by law.
* For tires with a maximum speed capability over 149 mph, tire manufacturers
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Nominal width of
tire in millimeters
Radial
Ratio of height to
width (aspect ratio)
Max.
permissable
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pressure
Passenger
car tire
Treadwear, traction
and temperature grades
Max. load rating
Tire ply
composition
and materials
used
Sever snow
conditions
U.S. DOT tire
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Load index &
speed symbol
Rim diameter
code