Stokke Trailz Classic is a newer iteration of the original Stokke Trailz with urban EVA foam-covered wheels, replacing the Stokke Crusi stroller. Since the carrycot, seat unit, and adapters are the same as on the Crusi, the replacement of the model lines is not that big of a change. The most prominent difference between the Trailz Classic and the original Crusi is that the Trailz is not compatible with the second - tandem seat as the Crusi was.