...could someone with the roof rack do me a favor and try taking the rubber strips out of the cross bars and then go for a quick drive to see if the rack whistles at low speeds (10-15mph). After installing the bike rack attachment, my rack now whistles at roughly 10 mph. It's hard to pin down the exact origin of the whistle, but my theory is that the whistle is caused not by the bike attachment itself, but by the removal of the rubber strips from the crossbars that allow the installation of the bike attachment onto the bars. Someone with the ski attachment also mentioned a whistle, so I'm thinking that the missing rubber strips is the common factor. If so, I should be able to cut the rubber stips and install them on either side of the attachment points to eliminate the whistle if that is the cause.