It will be Trimble’s first match for Ulster since October 2014, having missed much of last season with a toe injury. He is selected on the left wing, Bowe starts on the right, with fellow international Craig Gilroy at full-back.
Luke Marshall moves out to 13 with Stuart McCloskey starting alongside him at inside-centre. Ian Humphreys and Paul Marshall, who scored a try in last week’s run-out against Leinster, continue in the half backs.
In the front row Andrew Warwick and Wiehahn Herbst start either side of Rob Herring, who is selected at hooker.
Dan Tuohy and Franco van der Merwe are paired in the second-row with Clive Ross, Sean Reidy and Robbie Diack picked in the back-row.
Ulster head coach, Neil Doak, has named an extended panel for the game with 11 replacements making the trip to Scotland.
Forwards Paul Jackson, Ruaidhri Murphy, Peter Browne, Conor Joyce and Willie Faloon are joined by backs David Shanahan, Sam Windsor, Sam Arnold, Louis Ludik and Peter Nelson.
C Gilroy, T Bowe, L Marshall, S McCloskey, A Trimble, I Humphreys, P Marshall; (1-8): A Warwick, R Herring (Captain) W Herbst, D Tuohy, F Van der Merwe, C Ross, S Reidy, R Diack. Replacements: P Jackson, R Murphy, R Lutton, P Browne, W Faloon, D Shanahan, S Windsor, S Arnold, L Ludik, P Nelson, C Joyce.