Does anyone know what this bag weighs,and how big it is both folded up and opened out?
Its stout polythene and I would guess about half a kilo (bag of sugar)
Folded up about A4
Opened out it contains a road bike with nothing removed (like pedals etc.) with space all around and spare at the end to fold over and stick down with sticky tape.
It might even accommodate MTB even with the handlebars still in the ride position, as well as pannier racks in place.
I did contemplate disposing of the bag once used to save weight but it's so useful I have kept it for future use both on flights and putting the bike in the car