A tire structure comprising: a first annular bead and a second annular bead , a body ply extending between the first annular bead and the second annular bead , a circumferential belt disposed radially above the body ply and extending axially across a portion of the body ply , a circumferential undertread disposed radially above the circumferential belt and extending axially across a portion of the body ply , a first sidewall extending between the first annular bead and a first shoulder , the first shoulder being associated with the circumferential undertread , a second sidewall extending between the second annular bead and a second shoulder , the second shoulder being associated with the circumferential undertread ; the tire structure being characterized by further comprising an electronic device disposed radially between the circumferential belt and a bottom tread surface such that wear does not disable or damage the electronic device , wherein the electronic device includes: an emitter configured to emit pulsed electromagnetic waves having a frequency between 30 and 300 GHz and a bandwidth between 15 and 35 ps; a receptor configured to receive reflected electromagnetic waves; a processor that compares at least one property difference between an emitted and reflected wave; and a transmitter configured to transmit data to an interrogator, wherein the electronic device observes wear over the life of the tire, at sub-millimeter resolution. a first annular bead and a second annular bead , a body ply extending between the first annular bead and the second annular bead , a circumferential belt disposed radially above the body ply and extending axially across a portion of the body ply , a circumferential undertread disposed radially above the circumferential belt and extending axially across a portion of the body ply , a first sidewall extending between the first annular bead and a first shoulder , the first shoulder being associated with the circumferential undertread , a second sidewall extending between the second annular bead and a second shoulder , the second shoulder being associated with the circumferential undertread ; the tire structure being characterized by further comprising an electronic device disposed radially between the circumferential belt and a bottom tread surface such that wear does not disable or damage the electronic device , wherein the electronic device includes: an emitter configured to emit pulsed electromagnetic waves having a frequency between 30 and 300 GHz and a bandwidth between 15 and 35 ps; a receptor configured to receive reflected electromagnetic waves; a processor that compares at least one property difference between an emitted and reflected wave; and a transmitter configured to transmit data to an interrogator, wherein the electronic device observes wear over the life of the tire, at sub-millimeter resolution. an emitter configured to emit pulsed electromagnetic waves having a frequency between 30 and 300 GHz and a bandwidth between 15 and 35 ps; a receptor configured to receive reflected electromagnetic waves; a processor that compares at least one property difference between an emitted and reflected wave; and a transmitter configured to transmit data to an interrogator, wherein the electronic device observes wear over the life of the tire, at sub-millimeter resolution. <EOS>