Avid BB7 Road G2 140mm Rear Disc Brake. Raise your hand if you appreciate being able to stop on a dime no matter the weather or the riding surface. Smooth, powerful braking that's also simple to set up and easy to adjust is what the Avid BB7 140mm road disc brake offers for your disc equipped road or cyclo cross rig. The BB7 truly sets the standard for reliable mechanical braking performance that will make you wonder what took you so long to make the transition from rim brakes.
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