Originally Posted by
MidTNBrad
Check out
Proshift. I don't know much about them, or even if they are still in business, but it looks like they brought something to market for automatic shifting.
That’s pretty much what I was imagining, plus a little more. I was thinking power and cadence, but I didn’t think of heart rate and GPS. I was surprised at the $700 price, but given the cost of bike accessories, I shouldn’t have been.
I think Shimano (or other OEM) could do it built in to the existing electronics with less weight. And maybe even for less money.