I have a Cannondale CAAD9-6 and I have noticed that the brakes are very loud. Even when I apply the brakes at a low speed they make a lot of noise. And at high speeds the whole bike feels as if it is vibrating. I am using the stock Tektro R520 brakes with the stock brake pads. My wheelset is the stock Shimano R500. I wanted to know if the brakes are supposed to be like this or if something is wrong with the bike. Thanks!