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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 ...
It is legal and permissible for a tire manufacturer to give a particular tire line a lower treadwear grade. For example, if the highest treadwear grade in a manufacturer's lineup is 600, then a tire line with a lower treadwear test result might receive a grade of 400, instead of the 480 it could possibly receive.
For passenger and light truck tyres, the manufacturers or importers have the choice of either putting a sticker on the tyre tread or a label accompanying each delivery of batch of tyres to the dealer and to the end consumer. The tyre label will use a classification from the best (green category "A") to the worst performance (red category "G").
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 in the tread. This distinction is especially significant in the case of racing slicks, which have much tread but no grooves.
As well as retail, it operates a wholesale division, which supplies in excess of 6 million tyres a year [2] to its 2,500 plus wholesale customers. Previous owner Tony Todd, since selling the company in 2006, was ranked 782nd in the Times Rich List, 2011. [3] As at November 2023 Protyre operates more than 180 branches across the UK. [4]
Tire uniformity refers to the dynamic mechanical properties of pneumatic tires as strictly defined by a set of measurement standards and test conditions accepted by global tire and car makers. These standards include the parameters of radial force variation , lateral force variation , conicity, ply steer, radial run-out , lateral run-out , and ...
The chief reason for tire replacement is friction from moving contact with road surfaces, causing the tread on the outer perimeter of tires to eventually wear away. 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 company acquired Winston Tire Company in 1997, and moved ATD's headquarters from Lincolnton to Charlotte in 1998. [3] Heafner Tire sold Winston Tire Company to Performance Management, Inc. in 2001. [4] In 2000, Heafner Group acquired American Tire Distributors. [5] Heafner Tire changed its name to American Tire Distributors (ATD) in 2002. [6]