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http://www.stevehoggbikefitting.com/bikefit/2011/09/all-about-smps/ explains the thinking behind them.
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stevehoggbikefitting.com/bikeĀfit/2011/09/all-about-smps/ explains the thinking behind them.
Steve Hog mentions here that sit bone spacing isn't everything, some people rotate forward needing a narrower saddle (plus a cutout for your junk). I've always suspected this, it's nice to see it written by someone who knows what they're talking about.
Excuse my ignorance, but is there any particular problem that the dropped nose is supposed to correct?