2018 Trek–Segafredo season
The 2018 cycling season began in Australia at the Tour Down Under for Trek-Segafredo in January.
As a UCI WorldTeam, they are automatically invited and obliged to send a squad to every event in the UCI World Tour.
2018 roster
;Riders who joined the team for the 2018 season| Rider | 2017 team |
| Gianluca Brambilla | |
| Nicola Conci | neo-pro |
| Niklas Eg | Team TreFor |
| Alex Frame | |
| Tsgabu Grmay | |
| Ryan Mullen | |
| Toms Skujiņš |
;Riders who left the team during or after the 2017 season
| Rider | 2018 team |
| André Cardoso | Suspended |
| Marco Coledan | |
| Alberto Contador | Retired |
| Jesús Hernández | Retired |
| Edward Theuns | |
| Haimar Zubeldia | Retired |