Originally Posted by rekmeyata

YOU CAN'T GET STRONGER BRAKES! My god. Mechanical disk will stop a bike just as fast as hydraulic, because tire adhesion to the road surface is the most important aspects as to how fast you will stop. So, there is no reason in regards to stopping performance to upgrade from mechanical to hydraulics; now if you prefer to have a slightly smoother slightly less force to the feel to brakes, well then fine hydraulics win, but you won't win in its stopping performance. Hydraulics are also subject to fading more than mechanical brakes, and that's probably what happened in my test with my friend, I thought it was due to the rotor being hotter than the rim got, but after watching the video below they alluded to the hydraulics fade the more you use them, whereas the mechanical disk brakes don't have that issue, and neither do rim brakes in my test.

Mechanical vs Hydraulic Disc Brake Stopping Power Test - Bing video