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2. Brake bleeding - Wikipedia

   en.wikipedia.org/wiki/Brake_bleeding

   A brake bleed screw is normally mounted at the highest point on each cylinder or caliper. There are five main methods of bleeding: [1] The pump and hold method, the brake pedal is pressed while one bleed screw at a time is opened, allowing air to escape. The bleed screw must be closed before releasing the pedal, or a one-way valve must be fitted.

3. List of American high school students who have run a four ...

   en.wikipedia.org/wiki/List_of_American_high...

   After setting the national high school record in the mile, Jim Ryun set the world record in 1966 and then again in 1967, when he ran 3:51.1. Ryun was 19 at the time, making him the youngest world record holder in the mile to date. His record stood for nine years. [4] Ryun competed in the 1964, 1968 and 1972 Olympic games.

4. Mile run world record progression - Wikipedia

   en.wikipedia.org/wiki/Mile_run_world_record...

   The world record in the mile run is the fastest time set by a runner in the middle-distance track and field event. World Athletics is the official body which oversees the records. Hicham El Guerrouj is the current men's record holder with his time of 3:43.13, [ 1 ] while Faith Kipyegon has the women's record of 4:07.64. [ 2 ]

5. List of world records in athletics - Wikipedia

   en.wikipedia.org/wiki/List_of_world_records_in...

   The world best time for a "football 40" is 4.17 by Deion Sanders, while the extrapolated best for an Olympic-level athlete (including reacting to a starting gun) is 4.24 by Maurice Greene at the 2001 World Championships in Athletics. [252] [253] Under conventional football timing on a turf field in 2017, Christian Coleman reportedly ran a 4.12 ...

6. Middle-distance running - Wikipedia

   en.wikipedia.org/wiki/Middle-distance_running

   It is the longest track distance run in most high school competitions. [15] Jakob Ingebrigtsen ran an equivalent of a 7:51.35 3200m in his 2023 world best of 7:54.10 in the two mile run. Meseret Defar ran an equivalent of an 8:55.45 3200m in her 2007 world best of 8:58.58 in the two mile run.

7. Pacemaker (running) - Wikipedia

   en.wikipedia.org/wiki/Pacemaker_(running)

   Rabbits Abel Kirui, Elijah Keitany [] and Wilson Kigen [] pacing Haile Gebrselassie and Charles Kamathi at the Berlin Marathon 2008. A pacemaker or pacesetter, sometimes informally called a rabbit, [1] is a runner who leads a middle-or long-distance running event for the first section to ensure a high speed and to avoid excessive tactical racing.