Endless track assembly

An endless track assembly configured to mount to a rotating wheel drive of a vehicle, the endless track assembly having a central longitudinal plane and a lateral extent and comprising:

• a multi-component frame;
• a drive sprocket rotatable about a drive sprocket center axis, the drive sprocket adapted to be mounted to the rotating wheel drive of a vehicle, the drive sprocket having an outer radial surface and an inside surface opposite to the outer radial surface;
• idler wheels each rotatable about a central axis of the idler wheel relative to the frame;
• an endless track arranged in a generally triangular configuration around the frame, outside surface of the drive sprocket, and the idler wheels by being routed over a top portion of the drive sprocket to form an apex and also routed around the idler wheels to form a base that is wider than the apex, the endless track engaged with the drive sprocket at the apex and driven by rotation of the drive sprocket to circulate the endless track about the frame, drive sprocket, and idler wheels in a generally triangular path;
• a plurality of guide rollers each rotatably mounted to the frame and supporting the drive sprocket, each guide roller having a laterally inward portion and a laterally outward portion, the laterally inward portion closer to the central longitudinal plane than the laterally outward portion, the laterally inward portion having a radius smaller than the radius of the laterally outward portion, the laterally outward portion being journaled for rotation against or closely spaced from a laterally outward edge of the drive sprocket to provide a guide or a limit on the lateral movement of the drive sprocket, the laterally inward portion being journaled for rotation against or closely spaced from the inside surface, opposite to the outer radial surface, of the drive sprocket and restricting movement of the drive sprocket in a radial direction relative to the frame;
• and
• further comprising a plurality of guide bushings each rotatably mounted to the frame and supporting the drive sprocket, each guide bushing configured to engage an entire lateral extent of the outer radial surface of the drive sprocket and to rotate with the rotation of the drive sprocket.