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How fast is 55 kilometers per hour?

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 It's about nine-tenths as fast as Secretariat. In other words, 55 kilometers per hour is 0.9090 times the speed of Secretariat, and the speed of Secretariat is 1.10 times that amount. (at Belmont Stakes, 1973)Setting a record finish, Secretariat ran the Belmont Stakes — a 12 furlong race length — in 2:24, for an average speed of 60.4 kph in 1973. His margin of victory in the race, also a record-setter, was 31 lengths. It's about four-fifths as fast as a Gazelle. In other words, the speed of a Gazelle is 1 times 55 kilometers per hour. (for Thomson's Gazelle, a.k.a. Eudorcas thomsoni, a.k.a. "Tommie", a.k.a. "Tommy")A Thomson's gazelle can reach speeds of up to 80 kph. The gazelle's speed doesn't match that of its chief predator, the cheetah, but a gazelle's endurance usually ensures an escape in distances greater than 500 m (0.3 mi). It's about four-fifths as fast as a Hare. In other words, the speed of a Hare is 1 times 55 kilometers per hour. (for European Brown Hare, a.k.a. Brown Hare, a.k.a. Lepus europaeus, a.k.a. Brown Hare)The European Hare can run at speeds of up to 72 kph. While speed is a factor in their escapes, hares evade their chief predators — wolves, foxes, and golden eagles — by fleeing in a zigzag pattern. It's about three-fourths as fast as a Greyhound. In other words, the speed of a Greyhound is 1.320 times 55 kilometers per hour. (a.k.a. English greyhound) (approximate maximum speed)Greyhounds reach average race speeds of 72.4 kph. Despite their racing prowess, greyhounds are not considered energetic dogs — the typical greyhound race requires the dogs to run for less than 35 seconds. It's about one-and-a-half times as fast as Michael Johnson. In other words, 55 kilometers per hour is 1.4760 times the speed of Michael Johnson, and the speed of Michael Johnson is 0.67750 times that amount. (a.k.a. Michael Duane Johnson) (sprinter; 1967-) (at the Atlanta Olympics, 1996)Setting a record that stood for 12 years, Michael Johnson ran a 200 m in 0:19.32 for an average speed of 37.27 kph at the 1996 Olympics. Johnson was nicknamed "the Man with the Golden shoes" in recognition of the custom footwear worn during these races — a pair of Nikes with a left size of 10.5 and a right size of 11. It's about one-and-a-half times as fast as Usain Bolt. In other words, 55 kilometers per hour is 1.480 times the speed of Usain Bolt, and the speed of Usain Bolt is 0.6760 times that amount. (at the Beijing Olympics, 2008) (a.k.a. Usain St. Leo Bolt, OJ, C.D.) (sprinter; 1986-)Setting a world record, Usain Bolt ran a 100 m in 0:09.69 for an average speed of 37.2 kph at the 2008 Olympics. Furthermore, Bolt's margin of record breaking — 0.03 s — is the largest margin of victory in the history of digital measurements. It's about one-and-three-fifths times as fast as Flo-Jo. In other words, 55 kilometers per hour is 1.630 times the speed of Flo-Jo, and the speed of Flo-Jo is 0.61350 times that amount. (at the Seoul Olympics, 1998) (a.k.a. Florence Griffith-Joyner, a.k.a. Florence Delorez Griffith) (swimmer; 1959-1998)Setting a world record in 1988, Flo-Jo ran a 200 m in 0:21.34 for an average speed of 33.74 kph. Known as a 200 m runner, Joyner also set a record time in a 100 m race at in 1987.