Things You'll Need
Instructions
Turn off the Segway and unplug it from its charger.
Unscrew the cap on both tires' air valves.
Press the tire pressure reader against the valve until it returns a reading. The tire pressure should be 15 psi. Check both tires.
Turn on the air compressor and press the tire valve connector against the valve on one of the Segway's tires. Inflate the tire until you feel the tire begin to become firm.
Take the air compressor off the valve and use the tire pressure reader to check the pressure. If the pressure is below 15 psi, continue inflating the tire for several more seconds, then check again. Repeat until the pressure reaches 15 psi.
Repeat steps 4 and 5 for the other tire. Verify that the tires both have 15 psi, then replace the valve caps.