TIRE HISTORY

It began 1888, when John Boyd Dunlop for its son tinkered pneumatic tricycle tires. Heut thinks everyone with the word tire immediately of a pneumatic tire. This avails itself of the excellent elasticity of the air, which is available everywhere on the world free of charge. It provides for comfortable driving, small roll reconditions, good adhesion and a small noise level.

 It seems, as if always no better tire is conceivably than Luftreifen.Der successful veterinary surgeon from Belfast, 1840 in the Scottish Dreghorn born, into the private life had withdrawn themselves and found time for son Jonny on (10), that over advancing with its new tricycle deplored itself. Dunlop stuck a hose from a thin rubber plate on a wood disk, covered it with a line strip, as valve a Schnuller and inflated this so-called pneumatics with a football pump.

To the comparison it let the small front wheel of the tricycle and the air-springy roll over the yard. On half distance the front wheel remained being. The wood disk with the tire however rolled against the gate and snapped back. For the new rear wheels of the tricycle Dunlop rims from elm wood bent and drew the hose up. For the tire cover it used Segeltuch.Am 28 February 1888 was finished the new tricycle. A memorable day for father and son.

 Jonny tested the vehicle until late in night already on the next day drove it its vollgummibereiften schoolmates superior of it. To entitled pride the satisfaction came that Jonny with this first set of pneumatic tires put more than 60 miles back without breakdown. John Boyd Dunlop built further prototypes of his pneumatics also for two-wheelers. He ordered, cut the hoses with a manufacturer and stuck her together. On 23 July it submitted its experiences to the patent, which became effective it under NR10.607 on 31 October given and on 7 December. Completely in oblivion was guessed/advised 1845 R.W to that time. 

 

Thomson a pneumatic tire had developed and carriages with it had equipped. Because this did not withstand however the loads and 1850 stable full rubber tires arose, Thomson discharged of it. Its patent expired. Later confronted with Thomsons patent, Dunlop wrote years: " I do not say, I am the first inventor of the pneumatic tire. At that time I believed to be it, for the simple reason, because so a simple thing was not used. Fortunately for the entire wheel world I zurückerfunden" Thomsons pneumatic tire.

If the quantity of the water no more standing on the road cannot be canalized of the drainage grooves of the tire. # DOT number Named-giving American " Department OF Transportation" requires an indication to the age of the tire. The DOT number on the tire flank - for example " 327" designates the 32. Week 1997. Starting from the year 2000 the building week and the year of construction of a tire are represented in four digits within the DOT number.

That means, those last four numbers of the DOT number give building week and year of construction of the tire to on for example " 1601" designates the 16. Week 2001. # EMT " Extended Mobility Technology" - innovative technology of Goodyear for tires with Notlaufeigenschaften. The Eagle EMT can bridge even in the case of loss still distances up to 80 kilometers at speeds up to 80 km/h. # classes of data signaling rates Also speed index (SI) maximum speed mentioned, for which a type of tire is approved. The individual categories: Q to 160 km/h R to 170 km/h S to 180 km/h T to 190 km/h H to 210 km/h V to 240 km/h W to 270 km/h Y to 300 km/h ZR over 240 km/h. # tire size The designations appropriate on the flanks contain Größenbezeichnungen apart from data over manufacture date and type of tire also: 175/70 R 13 S means a section width of 175 mm and height width relationship of 0,7: 1. R stands for radial building method, 13 is the rim diameter in tariff and S the speed symbol for maximally 180 km/h. # rolling friction From the deformation (drumming work) of the tire rolling friction results. Design objective can it be attained as small a rolling friction and thus a smaller gasoline consumption as possible. # temperatures The friction value of india rubber is temperature-dependent. So that a summer tire works optimally, an operating temperature is ideal from 50 to maximally 90 degrees Celsius. If the tire overheats for instance by to small air pressure, its structure dissolves. # load-carrying capacity A two digit number on the tire flank, which so-called " Load Index" , information gives over the load-carrying capacity, which varies depending upon vehicle weight with same tire size - for example for small cars, middle class sedans or transporters.