After completing the installation I have a few parts left over, is that right?
Yes, that is quite possible. You will have some parts left over if the luggage carrier is level on the top. If the luggage carrier is not level at the back you will need these extra parts. They give the system added height so that the higher piece does not get in the way and the basket can be used.
tubes with diameter from 6mm till 20mm and maximum width of 180mm.