![]() And that once we decided 18-inch aluminum wheels was the primary driver, the engineering solution was pretty clear. “And I know that a lot of folks might say, ‘Well, if product relevance is your main goal, name me a car that has a single lug nut.’ I’m not sitting here saying I could, but I can name lots of cars that have 18-inch aluminum wheels. “The answer became pretty clear that we needed to go single lug nut,” Probst said. NASCAR will switch to a single lug nut for fastening its tire and wheel assemblies in Cup cars next season, ending decades of using a renowned five lug nut pattern.Īn official told NBC Sports the move was driven by the new 18-inch aluminum wheels (3 inches bigger than the current wheel) that will be used with the NextGen car, which will make its debut with the 2021 season, and are intended to increase product relevance for manufacturers.Īccording to engineering analysis, NASCAR senior vice president of innovation John Probst said the durability of the new wheels decreases by 30 percent with five lug nuts.
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