We have a Mobic City X7 bike and it fits inside this Samsonite Tote that's compliant with the 62 linear inch requirement, with just one pedal removed (
https://shop.samsonite.com/backpacks...43610XXXX.html). The highest part is the handlebar/steerer hinge, which would obviously need some protection for airline checking. But there's definitely space around the bike to add padding or reinforcement.