Big Thrills will add 40 new tracks, six new tournament modes and three new Achievements for 400 Microsoft Points (£3.40).
Ten of the included tracks will have been created by the community, with winning entrants receiving sweatshirts and cash rewards as prizes.
"The opportunity to include community-created content in the next chapter of the Trials story was really important to us," said Redlynx CEO Tero Virtala.
"The fans have definitely helped make the game the great success that it is, whether voting for us as the Best Downloadable Game in the Xbox Live poll, or by telling their friends how addictive the game is."
First expansion the BIG Pack was released last year.
> Click here to read our review of Trials HD