Sprinters – Men’s 100 Metres (World Record: 9.58) by Usain Bolt at the ’09 World Championships) 1. Usain Bolt (Jamaica) – Fastest Time: 9.58 secondsThe 100m Olympic record (9.69) was set by Bolt at the 2008 Summer Games in Beijing. 2. Tyson Gay (United States) – Fastest Time: 9.69 secondsDuring the 2008 U.S. Olympic Trials, Gay also ran a wind-aided 9.68 (once the fastest 100 m under any condition). 3. Asafa Powell (Jamaica) – Fastest Time: 9.72 secondsAsafa Powell ran his fastest time, once the world record, during heats at the 2007 IAAF Rieti Grand Prix. 4. Maurice Greene (United States) – Fastest Time: 9.79 secondsBy the widest margin since electronic timing, Greene ran this since passed world record...
There are five basic types of replacement spikes:
Pyramid spikes - used for dirt or grass surfaces as well as muddy cross country. 1/4 inch should be enough for any surface except grass javelin runways.
There are four basic types of track surfaces: Dirt or crushed granite - These tracks require needle or pyramid spikes, usually not more than 1/4 in. Asphalt - This is the hardest surface to run on. Spikes usually slip and slide around on asphalt so we recommend a cross country flat when running on asphalt. They have a rubber outsole without a hard spike plate. You'll only wear down your spikes by wearing them on asphalt, you wont gain any traction advantage. All Weather - made of rubber, tartan, or Mondo (carpet-like) material. Generally use 3/16 needle spikes or smaller on these tracks. Most tracks like this have regulations regarding the size you can wear. Indoor Tracks - Most temporary indoor...
