I bought a Bike Friday Tikit, used, the seller shipped it inside a suitcase..

That is what Bike Fridays company made their bikes to do,
and so a lot of touring rides around the globe are on those bikes.

they even offer a trailer kit,to put the suitcase on, to tow it behind your bike with your stuff in it,
Or, strapped on ..

A friend has brought his Stage Piano strapped onto his suitcase trailer , on his trip around SEA..




.....