Originally Posted by
JohnJ80
I also find the Bug virtually impossible to move on the Addit rack when the cams are engaged. It's locked on there.
Also, have you adjusted the position of the hooks, You should be able to adjust the hooks so that it's almost an extreme mount with the bag hanging off the back of the rack.
So I'm thinking something isn't quite right or it is attached incorrectly. Are you sure you have the cams set up properly? Is the release strap properly attached to the cams (if it isn't, the cams won't operate properly). Also, did you adjust the hooks to sit the bag aft on the rack?
Yes, I've adjusted the hooks so avoid heel clearance issues but with the lower bungee hook attached, the bag does keep sliding back a few centimetres. As per
this page on Arkel's web site the hooks have plastic inserts and the cams have a plastic surface, in fact, that page does mention at the end of section 2, that
"The first sign that the wire hook needs to be relocated is that the panniers will be pulled back towards the center; when this happens simply relocate the wire hook to a different slot" so Arkel do seem to acknowledge the possibility of movement of the bag on the rack.
Are the hooks on your Bug made with the same plastic inserts? I seem to recall reading that the hooks and cams on earlier models were entirely metal and had a habit of chewing up some racks.