This document specifies the characteristics of wheelsets for all heavy rail track gauges. This document applies to heavy rail vehicles and applies, in principle, to other vehicles such as urban rail vehicles. This document applies to wheelsets made from elements defined by the following European standards: - EN 13262:2020 for wheels; - EN 13261:2020 for axles. The requirements defined in this document apply to cylindrical wheel seats. Most of the requirements also apply to wheelsets with conical wheel seats. If needed, specific requirements for conical wheel seats (e.g. press-fitting curves, geometric dimensions...) are defined in the technical specification. Some characteristics are given according to category 1 or category 2.