Tire repairers and changers fix and replace tires on motor
vehicles. Saying, "I'm late because I had a flat tire" is about
the same as saying, "The dog ate my homework." It's been given
as an excuse for so long that people don't believe it. While
dogs typically chew on bones instead of trigonometry
assignments, flat tires are actually extremely common. In fact,
some studies estimate that 7,000,000 drivers called for roadside
help in 2004. Tire repairers locate holes and tears in tires and
make repairs. Tire changers rotate tires and replace worn-out
tires with new ones. Many tire workers both replace and repair
tires. Tire repairers and changers drive cars onto lifts so that
they can reach tires more easily. In addition, the weight of the
vehicles is not resting on the tires, which makes them easier to
work with. Repairers and changers loosen the lug nuts that hold
the tires onto vehicles. Next, workers remove the wheels and
take off the tires. If the tires are being replaced, tire
changers carry or roll the