It seems that since I upgraded from the 16s to the GTP 18s that I obtained for the summer season, that my wheels make almost like a whoosh sound, especially at lower speeds. I don't have slotted rotors or anything like that, so I know it's not coming from there. I don't remember this noise coming from the 16s at all. Could it be the crappy LS2 tires that came with the GTP rims?