Patent ID: 7905559

Claim:
An isolated center tread rim idler, comprising: an idler body; a circular rim including a radially outer portion configured to engage track bushings of a track assembly, and including a radially inner portion of less width than the radially outer portion, the radially inner portion including a substantially flat side surface, the radially inner portion configured to cooperate with an outer circumferential surface of the idler body, wherein the rim includes a curved transition portion between the radially outer portion and the radially inner portion; a resilient ring engaging the curved transition portion and contacting a first portion of the substantially flat side surface of the radially inner portion of the rim; and a side plate fastened to a side of the idler body, the side plate including a portion engaging the resilient ring and a portion laterally adjacent to a second portion of the substantially flat side surface of the radially inner portion of the rim.