Does the roof cross bars really make that much noise are you sure its not something else? But lets just say it is the roof rack that is causing the noise from 1-10 how loud is it and how much does it bother you?
Mine came with crossbars and I immediately removed them to increase aerodynamics. I will reinstall them in about 10 minutes if I need to put my roofbox on for a roadtrip. In the meantime, no sense in driving around town with something on the roof to increase drag. JMO
I drove at various speeds since installing the crossbars, up to 140 km/h on highway. Could not "feel" or hear anything different from before installing them. IMHO, these do not create any additional drag (or only does in a very negligeable way).
Just FYI....I recently purchased aftermarket crossbars because I didn't feel like spending alot and I do alot of outdoor adventures with the family and the factory ones look tacky. I bought theseAmazon.com: Inno Stays for Factory Raised Side Rails, Set of 4 (Black): Sports & Outdoors plus the bars which came to around $200. easy as **** to install and take off. The bars are squared so there is significant noise once you get above 30 mph but I don't have them on unless I am using them. I am thinking of getting fairings to see if the noise can be reduced some how.
I have never heard noise from the cross bars. Most of my driving is rural at 60 mph.
Although recently, I had to take my wife to the hospital in an emergency and at one point looked down at the speedometer which noted I was traveling at 105 mph. While I was concentrating on driving, it drove as if I was going 60 mph and without added wind noise. Before I get hate mail, I drove with extreme caution while overtaking and in the vicinity of other vehicles.