A problem that was solved ages ago, how to mount and remove a roof rack with a click or the turn of a knob, has become unsolved.

Today’s solution is to have special nuts (threaded holes) in the car’s roof and screws to match.
This means every car model has its own setup and it is quite a lot of job, possibly with a special tool, to mount the roof rack.

I suggest, in lieu of the classic drop list, to keep the threaded holes but to have an adapter to mount.
Normally the adapter should be taken off as soon as possible but if it is not, it is stream lined and creates as little drag as possible.

On this adapter the roof rack can be mounted with ease, and not screws.

This way the car can be as stream lined as possible. Then, when need arises and with a little work it can be prepared for roof racks. Finally the roof racks can be mounted and removed quickly and with ease.