Belgian Victor Campenaerts covered 56.792km in one hour at the high-altitude velodrome in Mexico City on April 16, 2019, setting the Hour Record. The 1,800m elevation reduces air resistance, which worked in his favor. The Hour Record is cycling's purest yet most brutal challenge -- an all-out test of endurance at maximum sustainable speed for 60 minutes. Legends such as Eddy Merckx and Miguel Indurain have attempted this storied record throughout history.