As a non-pair equal

Bought as a couple and not a couple.
The one-eighth what is common to these carriers are the key and that was about it.
To assemble both carriers in the direction of travel, first means a support rebuilding.
Now it should fit but it looks modest on the roof rack and the Converted is not a safe place, on the roof rack, here was simply not thought through. From a couple you can not talk there.
Now everything rebuilt back and bicycle backwards mounted.
But it turns me the question: the carrier backwards City Crash are tested?
From a leading specialist and for the high price you can but as a pair of bike carriers also bought a pair of expected and not only a direct locking system.
Since the developer has his work not done well at Thule, old Swede.

Postscript
Now have both carrier mounted in the same direction, because, according to the Thule carriers have been tested only in the direction of travel City crash and was now the carriers also test a while.
I drive an Audi A4 sedan with Audi original base carrier with T-slot.
The mounting of the support on the base support is quick and easy, and the load of the wheels on the bike rack as well.
Now to take the wheels on the roof.
No wind noise can also be heard in hearing speeds, silent as always, and you also do not notice something that one thing has on the roof.
The handling of the car is also as always.
What I saw was that the car had met behind me, long distance, what has surprised me.
Then afterwards I'm driven by car even my wife, who had the wheels on the roof to look at it.
With frightened, I realized that the wheels are extremely swinging back and forth, from left to right.
I thought the wheels struck me right from the roof.
We drove on a cobblestone road at low speed.
According to Thule, a slight swing of the wheels was normal.
Lightweight swing ???
Well, I now have absolutely no more secure feeling while driving after I had seen now.
However, there is unfortunately no other alternative to his wheels to transport on the roof. It is currently be the most secure system, also suggests the purchase.
Handling is certainly very easy and super fast.
Only the queasy feeling remains.