Track-supporting roller assembly for a crawler chassis

A road finisher comprising:

• a material bunker;
• and
• a crawler chassis including a drive wheel, a crawler track associated with the drive wheel and a track-supporting roller assembly for supporting the crawler track, the crawler track including an upper crawler section and a lower crawler section, the track-supporting roller assembly including a bearing unit and a track-supporting roller rotatably coupled to the bearing unit, wherein the bearing unit includes at least one bearing body, the track-supporting roller comprises a shaft having one end rotatably supported by the at least one bearing body, first and second supporting bodies fixed on the shaft in a rotationally-fixed manner and arranged coaxially side by side and configured to contact and support the crawler track, and a stop between the supporting bodies that spaces the supporting bodies apart, wherein each supporting body has an outer diameter that is greater than an outer diameter of the stop, and the outer diameters of the supporting bodies are the same, and wherein the supporting bodies are made of plastic to reduce noise and wear associated with the track-supporting roller, the upper crawler section rests on the track-supporting roller in a sagging manner, and an upper edge of the upper crawler section is spaced at least 50 millimeters away from a bottom of the material bunker.