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A far-reaching alteration to the Formula One technical regulations for 2022, covering every aspect of the car, prompted another significant change to the tyres. With an imminent move to 18-inch rims after more than 50 years of the 13-inch size, [51] Pirelli's 2022 tyres maintain the same tread width as before, but diameter has increased from ...
The VN used a 358-cubic-inch (6.0 L) Chevrolet engine such as used in the Chevrolet Monte Carlo, Chevrolet Lumina and Pontiac Grand Prix NASCAR's. Bob Jane had hoped to take the VN NASCAR for Grice to the United States to race in the NASCAR 's Winston Cup series, but a fallout between himself as the sanctioning body in Australia, and NASCAR in ...
This is followed by the aspect ratio (e.g.,"70"), which is the height of the sidewall expressed as a percentage of the nominal tire width. "R" stands for radial and relates to the tire construction. The final number in the code (e.g.,"14") is the mating wheel diameter measured in inches.
There is the rare exception of metric-diameter tires, such as the use of the 390 size, which in this case would indicate a rim of 390 mm in diameter. Few tires are made to this size currently. The number may be longer where a half-inch size is used, for example many heavy transport trucks now use 22.5-inch tires. [7] [8]
It is designed to make tire sizing consistent and clear. It replaces overlapping informal systems that ambiguously distinguished between sizes. For example, at least 6 different "26 inch" sizes exist (just by American notation), and "27 inch" wheels have a larger diameter than American "28 inch" (French "700C") wheels.
In 1998, grooved tyres were introduced with three groove lines in the front tyres and four groove lines in the rear tyres. [9] Between 1999 and 2008, regulations required the tyres to feature a minimum of four 14 mm (0.55 in) grooves in them, with the intention of slowing the cars down. This is because a slick tyre, with no indentations ...