SRAM S-900 Aero HRD Disc Brake Lever and Caliper Rear, flat mount, 20mm offset

Though it seems like a contradiction, stopping well actually makes you faster by letting you hold more speed later while approaching corners. That's the theory behind SRAM's S-900 Aero HRD Disc Brake setup, anyway. You can also carry more speed in confidence knowing that, if worse comes to worst, your brakes are more reliable, more responsive, and modulate better than rim brakes-especially when it comes to the type of deep carbon rims that most of us race for tri and TTs.