Flip-flop track rollers

A track roller member comprising:

• a body including a revolved configuration defining an axis of rotation, a radial direction, and a circumferential direction disposed about the axis of rotation, the body defining
• a proximate axial end disposed along the axis of rotation and a distal axial end disposed along the axis of rotation;
• and
• a half-tread portion including a first track interface region including an interface surface that is disposed proximate to the distal axial end, and defining a first aperture disposed axially between the first track interface region and the proximate axial end.

A track roller joint assembly comprising:

• a track roller including a
• a body of revolution defining an axis of rotation, a circumferential direction disposed about the axis of rotation, a radial direction extending normal to the axis of rotation, a first axial extremity disposed along the axis of rotation, and a second axial extremity disposed along the axis of rotation, the body of revolution further including
• a first rim portion disposed proximate to the first axial extremity and a second rim portion disposed proximate to the second axial extremity;
• an outboard track contact surface disposed axially proximate to the first rim portion;
• and the body of revolution further defining
• an exterior;
• a thru-hole that is in communication with the exterior and extending axially through the body of revolution;
• an inboard slot disposed axially proximate to the second rim portion;
• a shaft disposed in the thru-hole;
• and
• a radial bearing disposed in the thru-hole and contacting the shaft.