rotor clipping on break pads?
Ive got a new bike around 3 weeks ago , Its a Saracen Mantra trail 2018 there are Shimano M396 180/160mm Calipers. On the front disk break I sometimes notice a ringing noise usually when im going quite fast but not always. I took it to the bike shop and they said the rotors are perfectly aligned and the fluid is fine. I asked my friend who is quite good with bikes but he said its normal, but i highly doubt that seeing it never happened on my old bike. All help will be much appreciated, Thanks alot