These are ideal if you are carrying kayaks or bikes and know that lifting these into the centre of the roof will put a strain on your back. They're almost essential for safe loading on tall and / or wide vehicles. The bars slide out so you can load, for example, two bikes on the left side of your vehicle, then slide them the other way and load two more on the right. They're brilliant.
I put these on a 2012 VW Tiguan (using the Thule Rapid Crossroad Foot Pack) and probably should have gone with the 53" version for 2 kayaks. I only anticipated 1 kayak at time of purchase but the collection grew. Ended up getting a Takima J-Low to mount one on its side and one flat on the bars. Very tight squeeze (the J-Lows max weight for 2 kayaks isn't high enough if they are fishing kayaks - 110lbs). The J-Lows are VERY noisy and whistle when empty (gotta break out some duct tape and work on that...) but the bars - you won't notice they are there unless actively listening for them when unloaded.
As expected. Installation was a little tricky. First I got the wrong 'foot kit' for my vehicle on accident. Once that was corrected, the measurements in the included instructions were wrong for my vehicle. I looked up my kit online, found that there was a new version of the manual with new measurements for my vehicle. This turned out to be a closer fit but still not quite right. I had to 'widen' the measurements slightly... in order to allow the "doors" on the "feet" to close (these are the doors where you use the tool to crank down the brackets to your vehicle body to ensure a snug fit). Once completed, I'm happy with the product, just wish the installation instructions were a little easier to follow. There is an online video available through the 'thule fit guide' which was helpful but also not entirely accurate. I like this product because it is "modular" in the sense that when ski season is over, I can remove the attached ski racks and replace with bike/kayak racks.
Choose aerodynamic roof bars for superior performance and a sleek, sophisticated look that complements the lines of your car. These roof rack cross bars also have many smart design features. A textured surface disturbs the airflow and greatly reduces wind noise. The aluminium extrusion creates one of the strongest load bars in the market. The design gives you quick, no-hassle installation. While the end cap pivots and T-track make it easy to add further loading options.