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2. Tire maintenance - Wikipedia

   en.wikipedia.org/wiki/Tire_maintenance

   When the tread depth becomes too shallow, like for example below 3.2 mm (4/32 in), the tire is worn out and should be replaced. The same rims can usually be used throughout the lifetime of the car. Other problems encountered in tire maintenance include: Uneven or accelerated tire wear: can be caused by under-inflation, overloading or poor wheel ...

3. Harbor Freight Tools - Wikipedia

   en.wikipedia.org/wiki/Harbor_Freight_Tools

   In 1982, Harbor Freight Tools opened its first retail store in Lexington, Kentucky, to sell returned merchandise from its mail order business. The original location was at 1387 East New Circle Road. It later moved to 1301 Winchester Road, Suite 213. The venture proved successful, and Harbor Freight Tools began to open stores across the United ...

4. Uniform Tire Quality Grading - Wikipedia

   en.wikipedia.org/wiki/Uniform_Tire_Quality_Grading

   Uniform Tire Quality Grading, commonly abbreviated as UTQG, is a set of standards for passenger car tires that measures a tire's treadwear, temperature resistance and traction. The UTQG was created by the National Highway Traffic Safety Administration in 1978, a branch of the United States Department of Transportation (DOT). [ 1 ]

5. Contact patch - Wikipedia

   en.wikipedia.org/wiki/Contact_patch

   Colorized tire footprint pressure distribution. The contact patch is the portion of a vehicle's tire that is in actual contact with the road surface.It is commonly used in the discussion of pneumatic (i.e. pressurized) tires, where the term is used strictly to describe the portion of the tire's tread that touches the road surface.

6. Tire tread - Wikipedia

   en.wikipedia.org/wiki/Tire_tread

   As tires are used, the tread is worn off, limiting its effectiveness in providing traction. A worn tire can often be retreaded. The word tread is often used casually to refer to the pattern of grooves molded into the rubber, but those grooves are correctly called the tread pattern, or simply the pattern. The grooves are not the tread, they are ...

7. Tire bead - Wikipedia

   en.wikipedia.org/wiki/Tire_bead

   Tire bead is the term for the edge of a tire that sits on the rim. Wheels for automobiles , bicycles , etc. are made with a small slot or groove into which the tire bead sits. When the tire is properly inflated, the air pressure within the tire keeps the bead in this groove.