The invention relates to a ground compactor (1), in particular a rubber-tyred road roller, for compacting the ground (8) along a working direction (a), the ground compactor having a frame (3), a supporting frame (3) chassis, the chassis comprises a front chassis part (5) and a rear chassis part (6), wherein at least one chassis part (5, 6) comprises at least two chassis units (11) and is formed for making the chassis unit (11) wheel housings (12) insulated from the external environment, each chassis unit (11) is rotatable about a respective steering axis (L) and includes at least one wheel (10), the wheel housings (12) include at least two wheels A cover unit (18), and a wheel cover unit (18) is arranged on each chassis unit (11), and the wheel cover unit is configured to be rotatable with the corresponding chassis unit (11) around a corresponding steering axis (L). Furthermore, the invention relates to a wheel cover (12) for a ground compactor (1).