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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 ...
The National Tyre Distributors Association (NTDA). [1] is a trade association based in the United Kingdom. It was created in 1930 and represents tyre wholesalers, retailers, mobile tyre fitters and fast fit companies across the UK. It also has supplier members that include leading tyre manufacturers, retreaders, repairers and end of life tyre ...
UTQG ratings on sidewall of Toyo Tires Proxes R39 tire UTQG ratings (top) and tire code (bottom) on sidewall of Continental ContiProContact tire. 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.
In many prefectures, tread grooves of snow tires are worn off for more than 50% of their original depth, tires must be replaced to meet the legal requirements. [14] Drivers will be fined for failing to comply with the snow tire or tire chains requirements, and checkpoints are in place on major highways.
Grooved tyres are designed to remove water from the contact area through the grooves, thereby maintaining traction even in wet conditions. Since there is no tread pattern, slick tyre tread does not deform much under load. The reduced deformation allows the tyre to be constructed of softer compounds without excessive overheating and blistering.
To take a common example, 195/55R16 would mean that the nominal width of the tire is approximately 195 mm at the widest point, the height of the side-wall of the tire is 55% of the width (107 mm in this example) and that the tire fits 16-inch-diameter (410 mm) rims. The code gives a direct calculation of the theoretical diameter of the tire.
National Tyres and Autocare was formed in August 1970 under the name National Tyre Service Ltd. It brought together a number of companies to form the UK's first national network of tyre fitting centres. The components were Marsham Tyre Service, Briggs Tyre Service and Gorrills Tyre Service were owned and merged by Dunlop Ltd. [citation needed]
The tread is a thick extruded profile that surrounds the tire carcass. Tread compounds include additives to impart wear resistance and traction in addition to environmental resistance. Tread compound development is an exercise in compromise, as hard compounds have long wear characteristics but poor traction whereas soft compounds have good ...