Segway PT i2 Getting Started Manual page 137

Because safe riding of the Segway PT requires adherence to all
the instructions in this Manual, Segway recommends that you not
allow children to ride your Segway PT unless: (a) you have first
learned to ride, so that you understand the care and skill required
to ride safely; (b) the child has read this entire Manual and
watched the entire Safety Video; and (c) you are satisfied that the
child has the knowledge, maturity, and physical ability to ride
safely without endangering him/herself or others. As a general
rule, Segway recommends that riders be at least 16 years of age.
Maintain Tire inflation pressure at the level stated in the
"Segway PT Specifications Table" in the Reference Manual. If
you exceed the Tire inflation pressure stated on the Wheel label,
you increase the risk of loss of control, collisions, and falls. Lower
pressure reduces range and risks Tire and Wheel damage.
119