The avid bb7 mtb s mechanical disc brake has power control and strikingly good looks thats the story with the bb7 s mountain mechanical disc brakes from avid this update on the well established bb7 mountain includes new stainless steel hardware and sleek black anodizing that makes them look as fast as youll feel part of the beauty with the bb7 s mountain is the no brainer performance you get smooth modulated power and control plus user friendly setup and adjustability and the lightweigh