Before revision: Limits of speed The record is 44.72 km/h ( 27.78 mph), measured between meter 60 and meter 80 of the 100 meters sprint at the 2009 World Championships in Athletics by Usain URL (Bolt's average speed over the course of this race was 37.578 km/h or 23.35 mph.
After revision: Limits of speed The record is 44.72 km/h ( 27.95 mph), measured between meter 60 and meter 80 of the 100 meters sprint at the 2009 World Championships in Athletics by Usain URL (Bolt's average speed over the course of this race was 37.578 km/h or 23.48 mph.