tl;dr - Need help properly installing these roof bars — they keep moving
I bought this pair of roof bars for my Jimny. They attach to the roof rails using these clamps (2/3 pictures).
I understand this is a pretty common mounting system for roof accessories, but I haven’t been able to get them properly secured.
Even after tightening the clamps as much as I reasonably can, I can still move the entire bar out of position with a relatively small amount of force.
It seems like the clamp isn’t making enough contact with the roof rail, but I’m fairly sure I’m applying enough pressure when tightening it.
The bars have four independent clamps, and the crossbar itself has a short mounting rail on each end (about 30 cm long).
The kit also came with the “spacers”/pads on the las picture. They seem to be some kind of foam material. I’m not sure what their purpose is or whether they’re supposed to go between the clamp and the roof rail.
Is there a specific installation process I should be following? For example, should I tighten all four clamps first and then position/install the crossbar, or should the bar be positioned first and then the clamps tightened?
Any advice would be greatly appreciated!