A step of an escalator or a pallet of a moving walk has a supporting body with a base and at least one tread-element with a tread-surface wherein, on an underside that faces away from the tread-surface, the at-least one tread-element has at least one fastening protrusion. In the assembled state, the at-least one fastening protrusion protrudes through an opening in the base. Arranged on the side of the base that faces away from the tread-element, at least partly between the base and the fastening protrusion, is at least one fixing element. The fixing element fixes the tread-element against the base in a pretensioned manner.