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The “blast” of compressed air applies pressure to the top sidewall, temporarily seating the top
bead of the tire to the rim. The large volume of compressed air is then directed toward the bottom
sidewall and the lower bead of the rim. This process takes less than one second in most car and
light truck cars. The continual flow of the air through the valve stem maintains the pressure
against both beads; forcing them to seat permanently and allowing the tire to be inflated to the
correct pressure.
BEAD SEATING AND INFLATING
WARNING:
A WHEEL/ TIRE ASSEMBLY CAN EXPLODE
(causing death, injury, or damage) WHEN THE FOLLOWING OCCUR:
The diameter of the rim is different from the tire size.
The rim or tire is defective.
The recommended inflation pressure is exceeded during bead
seating.
The tire inflation pressure is higher than the maximum
recommended by the tire manufacturer.
The operator does not observe and follow safe procedures.
