Article: Tires: exhausting the possibilities: stress safety if you repair your own tires.

Should you do tire maintenance in-house or contract for it? With your own people, you may have more control; the comparative cost depends on your situation.

"We sub out tire repair," says Ed Jongsma, fleet supervisor for Ozinga Bros. Inc., Mokena, Ill., which runs 180 ready-mix trucks from eight plants in south suburban Chicago. "We changed from doing it ourselves about four years ago. We promoted the tire-care person, and we changed to an outside vendor." Still, it's the responsibility of mechanics, not the drivers, to inspect tires for air pressure and tread depth.

"The outside vendor costs a little more, but they have mobile trucks that go to all of ...

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