Those intrigued by Klein's track-bias formula might find also of interest his more complex method of calculating speed points.
Pertaining to formulaic ways of detecting what running style a surface might favor, or compromise: these systemic approaches would probably be useful in flagging potential trends for closer scrutiny from those following numerous tracks. But in focusing on just one track, I have the time to look deeper and take more factors into account in forming an opinion I trust more than any "rating." And occasionally it's some subtlety , or other, picked up on visually, that can tip me off to a surface trend before the public catches on.
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