I have flown with Scicon Aerocomfort Tri and a smaller hardcase. The scicon bag was big enough to leave the aerobars and seat intact. I just zipped tied pipe insulation around the frame/forks/seat stays/etc. The thule bag you have doesn't look to be big enough or designed to leave things attached so you would have to do what I had for the smaller hardcase.
1. Dislodge the front and rear brake wedge for more cable slack
2. Leave speed fin off and wrap.
3. Detach the headset ( 3 screws under the basebar) leaving the rest of headset intact. I have DI2 so didn't need to worry about shifter cables.
4. Remove seat post (might be able to just drop it down)
5. I removed rear derailleur, wrapped it and zipped tied to the seat stay
6. I removed the chain to keep it from damaging the frame.
7. Bubble wrap or wrap the headset assembly and zip to frame to prevent from damage
8. pipe insulation around the entire frame (maybe overboard but i'm paranoid)
9. Don't let any be loose in the bag, make sure everything is an pocket or zip tied to the frame or something sturdy
10. Bring extra zip ties for return flight.
hope this helps.
This was very helpful, thank you. Few more questions:
- Is there a type/brand of bubble wrap that works well? I never ship stuff so I'm ignorant here, and looking on Amazon there's a huge range of options. For example don't know if I need "large bubbles" or not.
- How important do you think it is to remove the chain? I've never done it, so a little hesitant, but maybe it's no biggie