They were placed on a Suzuki SX4, on the factory parallel bars, as they say, they certainly fit many vehicles since they are telescopic (extend - retract), as long as the car is not too narrow (in the SX4 I adjusted them to their shortest and they are fine, if it was narrower they would protrude quite a bit), first measure the distance between the parallel bars. They seem sturdy and stable for the one and only reason I got them, carrying a kayak of about 25kg and occasionally a SUP (if inflated) 10+kg, so 35-40kg together (60-90kg capacity, as stated on the box). Now, I took off one star because they are not for quick installation, they are only for installation! It just takes time to screw the eight safety bolts, there is no room for your hand for the interior ones and it's somewhat annoying with small movements (you can do it much faster with a ratchet wrench, which has a ratchet, I didn't have it at the time, maybe I'll get one just for that). As soon as I hit the highway we will see how they perform in terms of noise and I will add my experience. They are discreet though, not some bulky things!