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... if there were huge advantages the pro teams would have adopted it...
I'm not sure that there are massive gains to be had, rather there's no downside and there are incidental benefits: higher cadences are easier, less stress on the knees, open hip angle, and positional options.
If you find more power and are more aero, then that's a bonus.
Most of cycling would rather forswear their first born, than believe that crank length is not dependent on leg length, so it's hardly surprising there's little demand for good quality, short cranks.
I've read his articles before on much shorter cranks. Quite interesting.
Do you think if there were huge advantages the pro teams would have adopted it? Maybe they've not looked into it as deeply.