Avid's flyweight X0 stoppers are powerful enough to stop you on a dime and sensitive enough to modulate you down the trickiest descents. With Avid's Contact Point Adjustment, Power Reserve Geometry, and lever reach adjust it's simple and easy to choose between the modulation of a longer throw or the instantaneous power of a short throw. Combine that with Avid's Deep Stroke Modulation and TaperBore technology that gives you incredible control over these hugely powerful brakes and you have some of the most customizable, controllable stoppers around. And, perfect installation has never been easier thanks to Avid's renowned Tri-Align Caliper Positioning System. The X0 also comes spec'd with Avid's HS1 rotor.