A roller freewheel unit for a vehicle includes an outer sleeve element, an inner ring element and a cage element for accommodating spring/roller elements. The inner ring element has at least one radially protruding sliding shoe element, which can be inserted into a corresponding receptacle of the cage element in the axial direction in order to interconnect the inner ring element and the cage element. The inner ring element may have multiple sliding shoe elements arranged on the circumference of the inner ring element, and the cage element may have correspondingly arranged receptacles. The outer sleeve element may be slid onto outer surfaces of the sliding shoe elements in such a manner that the outer sleeve element is centered and supported by the sliding shoe elements.