According to a New York Times article, this is part of a trend that has seen full-size spares shrink to smaller “doughnut” spares. The upside: less weight and better gas mileage. The downside: no spare. Of course thinking about tires and spares leads to a lot more engineering solutions to think about: run-flat tire design, self-sealing tires, providing leak repair kits and compressors. Of course, with surveys showing that 20 percent of drivers don’t know how to change a flat tire, maybe our cars just need to come with roadside assistance.
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