This track roller guides along a mating surface using a single row of balls running in a particularly thick-walled outer ring, with the outer ring axially guided by the balls themselves against the inner ring. Bore diameter is 35.0 mm, outside diameter 80.0 mm, height 17.0 mm, and net mass is 0.4 kg. The 2RSR sealing consists of lip seals fitted on both sides, one with axial sealing action and one with radial sealing action. The thick-walled outer ring gives the track roller the load-carrying capacity needed for direct rolling contact on a track or rail surface, while the ball and cage assembly with the inner ring allows the roller to rotate freely under this load. The double-lip seal arrangement, combining axial and radial sealing, keeps contaminants out of the rolling path on both faces without requiring additional external sealing, and the closed design retains the internal lubricant, supporting consistent running behavior over the roller's service life.