Quote:
Originally Posted by tv_vt
I rode a century Saturday with a Di2-equipped bike. Was riding the next evening with my wife and happened to see her twist her left hand as she shifted into the big ring.
Later I commented that I might get her a Di2 setup and mentioned that I must've saved a ton of calories using Di2 instead of mechanical shifters over the course of the 100 mile ride.
Let's say I shifted 1000 times (10 times per mile - that's possible given how rolling the course was - maybe it was even more, don't know). The simple press of a single finger versus way more force needed for mechanical shifters had me thinking I saved at a minimum a few hundred calories.
But who knows. Any thoughts on this? Any real studies? I know pros choose to use mechanical for courses like P-R, but most often are using electronic shifting. Do they know something we don't?
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Shifting a well maintained mechanical takes little effort and quieter than Di2.
If someone has issues with their hands than I can see it making a difference in the amount of effort needed to shift, however that effort is marginal