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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 ...
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 ...
However, two tires with exactly the same compound should have a treadwear rating that varies in accordance with tread depth. The assigning of UTQG grades is done solely by the tire manufacturer. In many cases, this has resulted in the UTQG grading system to be more of a marketing tool than was originally intended.
TWI: Tread wear indicator – a device, such as a triangle or a small Michelin Man icon, located where the tread meets the sidewall, and indicating the location of the raised wear bars in the tire tread channels – TWI is also used to refer to the raised wear bars themselves. VSB: Vertical serrated band; WSW: White sidewall
Hydroplaning: Motor vehicles or aircraft tires passing over a wet pavement may lose contact with sufficient speed or water depth for a given tread design. In this case, the tire contact area is riding on a film of water and loses the friction needed for braking or cornering and begins to hydroplane (or aquaplane).
Grand Prix 5000 All-Season TR Tire. If you plan to only buy one set of tires for everyday riding, training, and racing, consider the legendary Grand Prix 5000 All-Season TR.
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