Pretty much every unit and every base maintenance got the re-grooving tool some 15 years back. It cam about when the HLVW LCMMs checked into their tire useage to see that 90% of the tires that had been replaced were still serviceable. On many of them, the stabilizer bars were being mistaken for wear bars. With a bit of time cutting, the tires could have a bit of life extension.
That said, I never saw one used. Too many jobs and not enough mechanics.
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