[3] Three wildcards were chosen for the main event, in addition to the 12 qualifiers; they were Mathias Pollestad, Anže Grmek and Petr Chlupáč.
[4] Poland's Mateusz Cierniak won the title for the second season running, becoming only the fourth rider to win multiple Under-21 World Championship titles after Emil Sayfutdinov, Darcy Ward and Maksym Drabik.
Damian Ratajczak took second with Bartłomiej Kowalski completing an all-Polish podium.
Emil Breum, Keynan Rew and Esben Hjerrild won the qualifying rounds.
In addition to the 12 qualifiers, Anže Grmek, Mathias Pollestad and Petr Chlupáč were named as series wildcards.