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     Tire Dictionary

Select a topic from the list below to learn more.

• Air Pressure
• Alignment of Vehicle
• All Season Tires
• Anti-Lock Brake System (ABS)
• Anti-Slip Control (ASR)
• Aquaplaning (Hydroplaning)
• Asymmetrical Tread
• Balancing
• Bead
• Braking distance
• Camber
• Casing
• Chains
• ContiComfortKit (CCK)
• Date of Manufacture
• Direction of Rotation
• DOT Serial Number
• Electronic Stability Program (ESP)
• Emergency Mobility Systems
• Hydroplaning (Aquaplaning)
• Load Index, Ply Rating or Load Range
• Minimum Removal Tread Depth


• Mixing Tires
• Radial Tires
• Reinforced or XL (extra load) Tires
• Replacement
• Revolutions Per Mile (RPM)
• Rolling Resistance
• Rotation
• Self-Supporting Run-Flat Tires (SSR)
• Speed Symbol
• Temporary Spare Tires
• Tire Gauge
• Tire Size Designation
• Tire Storage
• Toe
• Tread
• Tread Depth
• Tread Wear Indicator (TWI)
• Uniform Tire Quality Grading (UTQG)
• Valve
• Valve Cap
• Winter Tires

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Air Pressure

Check Your Air Pressure Once a Month
Incorrect air pressure is the leading cause of tire damage. To avoid tire damage you need to check your tire’s air pressure once a month.

The correct tire pressure can be found in the following places:
• In the car’s owner manual
• Gas tank lid
• Driver’s side door’s edge
• Door post

The air pressure listed on the side of your tire is NOT the correct air pressure for your vehicle. That number is the maximum air pressure for the tire. Don’t get stranded and avoid costly towing expenses. Check your air pressure on your spare regularly. Note: If you have different rims than came on your vehicle originally, make sure that the bolts on your spare tire are the correct fitting. Failure to keep your tires properly inflated can increase wear and will have a negative effect on your vehicle’s handling.

When checking and adjusting tire pressure, the following should be kept in mind:
• Check the air pressure when the tire is cold – tires become hot even after driving just a mile. If you must drive to add air, check your air pressure before you leave. Air pressure changes 1-2 pounds for every 10 degrees of temperature change. Air pressure goes up in warm weather and down in cold weather.
• Tire pressure must be the same on the tires of each axle, but may be different on the front and rear axle.
• Valve caps must be tightly closed to protect the valve from dust and dirt and prevent it from leaking.
• Replace missing valve caps without delay.

Take this opportunity to inspect your tires to make sure there are no punctures and they are free of deformities.