The size of the aggregate used for the haul road base makes a big difference in tire wear and, ultimately, productivity.
Take this example: A site survey at one operation recommended they reduce the size of the aggregate from 7.6 centimeters to 3.8-centimeters. The change enabled the company to improve annual productivity by 2,500 hours per truck because they were able to run at higher speeds and the roads did less damage to the tires.
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