This study examined the existence and nature of dispositional goal orientations and perceived reasons for sport success among adolescent disabled athletes. Also, the interdependence between personal goals and views about the determinants of sport achievement was determined. Fifty-nine athletes with physical disabilities completed the 13-item Task and Ego Orientation in Sport Questionnaire specific to wheelchair basketball and a 21-item questionnaire concerning beliefs about the causes of sport success. Factor analyses revealed two distinct goal-belief dimensions. The first dimension indicated that task orientation was associated with the views that practice, exerted effort, and external factors lead to success. The second dimension suggested that ego orientation was coupled with the beliefs that ability, chance, taking an illegal advantage, or all three result in accomplishment in sport. The present findings are contrasted with previous classroom research and studies of able-bodied sport participants, and their implications for the understanding of motivation are provided.