A distance determining system includes a first transceiver and a second
transceiver spaced a distance from the first transceiver and inductively
coupled thereto. The first transceiver outputs a first electromagnetic
wave. The second transceiver receives the first electromagnetic wave and
outputs a second electromagnetic wave, which is received by the first
transceiver. One of the first and second transceivers determines a
distance therebetween based at least in part upon the elapsed time of
travel of the first and second electromagnetic waves. An air spring
assembly can include such a distance indicating system. A method of
determining a distance is also included.