I've always wondered approximately how much ground a horse loses to a rail runner when he goes wide on the turn. It probably varies according to the configuration of the track, but I'm no engineer, so have never even been able to make a good variable to factor into my handicapping system. Large tracks that are a mile around have more sweeping turns and shorter tracks have sharper bends. I would estimate thoroughbreds are around 3 feet wide, meaning a horse that is '3 wide' would be at least 10 feet from the rail, after accounting for a little running space between horses. One that is 5-wide would probably be about 20 feet away from the rail, but I know he loses a lot more ground than that on the turn. Maybe somebody who has an idea about the spacing of staggered starts in track would have an idea, but of course people tracks are much smaller than horse tracks.
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