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Show DIRT HIGHWAYS ARE EASIEST Unpaved Country Roads Cause Least Wear on Tires, While Slag Is Most Destructive. The much maligned dirt road finds a champion in a Denver tire manufacturer, manufac-turer, who asserts that exhaustive tests show that the unpaved country road causes the least tire wear. But the road must be in good condition, with no ruts to wear against the side walls of the tire. When properly dragged, the unpaved country road is found to generate less heat in the tire than any other type of road. Slag roads were found to be most destructive to tires, the sharp points Soon pitting the tread with my holes. With the test car's wheels a fraction of an Inch out ef alignment, the tires looked as if their tread had been sandpapered sand-papered after only a few hours' travel. Asphalt pavement was found to develop de-velop much heat, but little external wear. Macadam roads in good condition condi-tion were found to be better than slag. |