I bought these bars because they are aluminum and felt that they would last longer than steel bars which I needed to replace (Yakima) due to rust when I purchased a new car. They also look sleek. I was quite surprised after installing the bars with Thule Peloton Roof Bike Carriers how noisy the bars are due to resonation from wind resistance. I installed the recommended Thule Fairings to solve this issue. The fairings elliminated 80% or so of the noise, but not all. I live in a snow region so will have to remove, store, and re-install the fairings each year. In sum, I would recommend steel bars until Thule redesigns the alluminum bars to not resonate so much noise.