Pivotal in the brute stopping force of Campagnolo's Ergopower H11 Disc Brakes, the H11 AFS Rotor maintains thermal resistance during lengthy descents and high-octane scenarios where disc brakes are pushed to the absolute limit. The inner-aluminum spider helps with heat dissipation, meaning you'll feel confident braking on extended descents where other rotors get overly hot and lose braking power. Backing Campy's claims of superior braking, the H11 Rotor stops reliably to 800 watts without suffering damage, such as melted alloy and reduced rotor thickness. This is especially impressive when you realize one of the major competitors suffered damage at only 650 watts of force, showcasing the H11's ability to effectively disperse heat without warping or bending. Seeing the front takes the brunt of stopping force, the front rotor is only available in a 160-millimeter version, whereas you can choose between a 140 and 160-millimeter rear. Because disc brakes are inherently more dangerous in high-speed crashes, Campy designed the H11 Rotor with a smooth perimeter that reduces the chance of slicing open your body in the event of a nasty crash. To ensure safety, Campy employed a Swiss lab to simulate the H11 Rotor versus the competition when pushing against a skin-like model with high force. Results showed the competitor's wavy rotors sliced through the simulated tissue, whereas the H11 didn't leave a cut inflicted upon the model. Although still controversial in professional racing, disc brakes can be implemented in a safe fashion, with Campagnolo leading the charge in developing smooth rotors that lessen the chance of crash-induced cuts and nasty incisions.