Herkes arttırıyor ben azaltıyorum ilk vitesler...
http://www.bikeraceinfo.com/images-all/photo-galleries-images/images-derailleurs/campy-paris-roubaix-galetti.jpg
http://www.bikeraceinfo.com/images-all/photo-galleries-images/images-derailleurs/campy-paris-roubaix-galetti.jpg