The 2021 Team Speedway Junior World Championship was the 17th FIM Team Under-21 World Championship season. The final took place on 10 September 2021, at the Polonia Bydgoszcz Stadium in Bydgoszcz, Poland.

The hosts Poland won their 14th Team Under-21 World Championship and eighth in succession. A new format was in place for 2021 with 7 teams; Poland, Denmark, Great Britain, Latvia, Sweden, Australia and the Czech Republic competing, with Germany listed as a standby team.

Final Bydgoszcz 10 September 2021

Pos. National team Points 1 Wiktor Lampart 24, Jakub Miśkowiak 21 45 2 Mads Hansen 17, Marcus Birkemose 11, Tim Sørensen 7 353 Tom Brennan 20, Drew Kemp 5, Leon Flint 2 274 Keynan Rew 17, Matthew Gilmore 9 26 5 Petr Chlupáč 12, Jan Macek 6, Daniel Klíma 5 236 Francis Gusts 15, Daniił Kołodinski 7, Ričards Ansviesulis 0 227 Philip Hellström Bängs 14, Alexander Woentin 6, Jonatan Grahn 0 20

See also 2021 Speedway of Nations 2021 Individual Speedway Junior World Championship

References