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Zigzag sipes on tire tread. Siping is a process of cutting thin slits across a rubber surface to improve traction in wet or icy conditions. Siping was invented and patented in 1923 under the name of John F. Sipe. [1] [2] The story told on various websites is that, in the 1920s, Sipe worked in a slaughterhouse and grew tired of slipping on the ...
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.
The first commercial use of siping was a year earlier, where Tecalemit used a knife-cutting process almost identical to Sipe's original patent as a means of recutting worn treads. Europe also abandoned the slow process of literally knife cutting in favour of steel blades in the tread moulds, forming the sipes by moulding.
A narrower aspect ratio between the diameter of the tire and the tread width to minimize resistance from the plowing effect of the tire through deeper snow; Hydrophilic rubber compounds that improve friction on wet surfaces; Additional siping, or thin slits in the rubber, that provide more biting edges and improve traction on wet or icy ...
M+S, or M&S: Mud and snow; A tire that meets the Rubber Manufacturers Association (RMA) and Rubber Association of Canada (RAC) all-season tire definition. [20] These are commonly found on all-season tires, with self-cleaning tread and average traction in muddy or very snowy conditions, and for low temperatures.
Most politically charged item. Rest in peace, Adidas Sambas. Time of death: April 4, 2024 — coincidentally the same time former Britain’s then-Prime Minister Rishi Sunak donned a pair for a ...
They perform well on snow and carry chains well, but their large area of smooth unbroken rubber makes them poor performers on ice. The small footprint of the bar grip tread makes them perform poorly on sand. Even in the 1930s, 'balloon' tyres with wider treads, smaller tread patterns and lower pressures, were available for desert use. [5] [6]
The radial axis runs from the tire center toward the tread, and is the vertical axis running from the roadway through the tire center toward the vehicle. This axis supports the vehicle's weight. The lateral axis runs sideways across the tread. This axis is parallel to the tire mounting axle on the vehicle.