Piste preparation vehicle

A tracked vehicle comprises a body and at least one left and one right track drive unit (5). The track drive units (5) are connected to the body via a machine axle (19) and each have a first and a second idler roller (8, 9) as well as a first and a second support arm (22, 23) on which the idler rollers (8, 9) are mounted. The first and second support arms (22, 23) of each drive unit (5, 6) are mounted so as to be independently pivotable about the machine axle (19).