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Auto shifting with Di2...theres an app for that

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Auto shifting with Di2...theres an app for that

Old 11-15-12, 11:57 AM
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Auto shifting with Di2...theres an app for that

Oh well, it had to happen. Marry sensors, bluetooth and a smartphone app and there you have it...real automatic transmission! This idea takes it one step ahead too "and it could use the phone’s GPS feature to preemptively shift in anticipation of upcoming inclines or downhill slopes" .

More info here
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Old 11-15-12, 11:59 AM
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Ugh. Sounds disconcerting more than anything. It's really not that hard to just shift for yourself.
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Old 11-15-12, 12:21 PM
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I guess you could configure an app to shift to maintain optimum cadence, or heart rate, or whatever else you wanted. For myself I think I'd rather keep control of my own gears though.
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Old 11-15-12, 12:28 PM
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Before you know it, they'll start putting motors on bicycles... oh, wait...
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Old 11-15-12, 12:35 PM
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This appears to be a bit over the top and unecessary.

What would be cool though would be a single button mode where one click up or down, shifts either or both derailluers as necessary to run sequentially through the optimal gear combinations, making cross over shifts at the right point, avoiding redundant combinations, and cross chaining.
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Old 11-15-12, 12:38 PM
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When are we going to get a real CVT for the rear? All this shifting is for the birds.
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Old 11-15-12, 12:45 PM
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Not just unnecessary, but dumb.

It's really important to know exactly when the shift occurs. Having a chain suddenly thrown onto a different cog or ring when you weren't expecting it is asking for trouble.
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Old 11-15-12, 01:15 PM
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Originally Posted by TrojanHorse
When are we going to get a real CVT for the rear? All this shifting is for the birds.
Seriously though if someone could come up with a lightweight, affordable efficient CVT that avoided a derailleur and worked on a lever shifter I think it would be very useful. Having an infinite array of gearing without the clunking and chain movement would be superb in my book.
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Old 11-15-12, 01:18 PM
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Originally Posted by merlinextraligh
This appears to be a bit over the top and unecessary.

What would be cool though would be a single button mode where one click up or down, shifts either or both derailluers as necessary to run sequentially through the optimal gear combinations, making cross over shifts at the right point, avoiding redundant combinations, and cross chaining.

This sounds cool and, if memory serves, someone did this several years ago to mod Di2 for an mtb when it first came out.
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Old 11-15-12, 01:28 PM
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Originally Posted by TrojanHorse
When are we going to get a real CVT for the rear? All this shifting is for the birds.
https://www.youtube.com/watch?v=cd2-vsTzd9E

https://www.fallbrooktech.com/node/24
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Old 11-15-12, 01:46 PM
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Originally Posted by himespau
This sounds cool and, if memory serves, someone did this several years ago to mod Di2 for an mtb when it first came out.
Fairwheel bikes hacked a Di2 RD for a MTB, and programmed it to operate off a single shifter.
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Old 11-15-12, 06:14 PM
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Originally Posted by TrojanHorse
When are we going to get a real CVT for the rear? All this shifting is for the birds.
Nuvinci hub. Just 2450 grams.
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Old 11-15-12, 06:44 PM
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I have a Di2, don't need an app for it! It shifts just awesome the way it is
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Old 11-15-12, 07:28 PM
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Completely unnecessary for an electronic bicycle drivetrain.
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Old 11-15-12, 07:43 PM
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Maybe this says more about how twisted I am, but when I read the thread title I imagined an app designed to shift ​the other guy's bike.
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Old 11-15-12, 07:45 PM
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Friction shifting was hard enough for some guys that the idiots couldnt figure it out so indexing came out, then brifters came along because some idiots coudlnt figure it out how to ride and be able to move their hands off of the handlebars to reach the down tube shifters. Now electronic that pretty much take the headaches out because the guys dont even have to figure it out what to do, just click and perfect. Now to make it even more idiot proof automatic shifting? wtf?
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Old 11-15-12, 07:59 PM
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I think erg mode on a real bike could be kinda neat. Set yourself at 250 watts at the bottom of a canyon and just go.
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Old 11-17-12, 12:04 AM
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Originally Posted by ultraman6970
Friction shifting was hard enough for some guys that the idiots couldnt figure it out so indexing came out, then brifters came along because some idiots coudlnt figure it out how to ride and be able to move their hands off of the handlebars to reach the down tube shifters. Now electronic that pretty much take the headaches out because the guys dont even have to figure it out what to do, just click and perfect. Now to make it even more idiot proof automatic shifting? wtf?
i'm glad i know you're kidding
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Old 11-17-12, 12:48 PM
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Being sarcastic is just kidding ?
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Old 11-17-12, 12:58 PM
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seems like one more thing to break when you are in the middle of no-where
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Old 11-19-12, 10:01 AM
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When Di2 came along, i guess we crossed the Rubicon from purely mechanical to to an electro-mech platform. Once thats in place, the possibilities are pretty vast, including the the potential inclusion of an F1 style KERS system (bank the energy going downhill and use it to get a little push on the uphill), as the designers of the app are fantasizing about. I say fantasy only because the weight penalty will pbly more than overwhelm any efficiency gains at this time.

But then again, like an Auto transmisison and then DSG/dual clutch etc in automobiles, with time and a market for ease of use, efficiencies will be eaked out to match a manual shifter, and this could well be the inexorable path we will be on, considering that there is a market that is not bothered too much with weight.
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Old 11-19-12, 10:05 AM
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Next thing you know you can just send the bike out by itself while you sit at home pushing buttons, snacking, etc.
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Old 11-19-12, 10:05 AM
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Originally Posted by VeeDubOne
. Once thats in place, the possibilities are pretty vast, including the the potential inclusion of an F1 style KERS system (bank the energy going downhill and use it to get a little push on the uphill)
Anytihng that stores and then releases energy violates UCI rules.

And while the vast majority of bikes don't need to omply to UCI rules, that one is so fundamental to the nature of a bike, I don't see it changing.
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Old 11-19-12, 10:14 AM
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Originally Posted by VeeDubOne

But then again, like an Auto transmisison and then DSG/dual clutch etc in automobiles, with time and a market for ease of use, efficiencies will be eaked out to surpass a manual shifter
FTFY

PDK dual clutch transmission is dramatically better than any manual transmission ever built. It shifts faster, results in better zero to sixty time, and 1/4mile times, gives better fuel economy, executes perfect rev matching on down shifts, and almost always finds the right gear for the situation.

And you can play with paddle shifters for fun, but there's really no need.

The nature of the dual clutch which allows the next gear to already be selected before the gear your in is released, makes it impossible for the best driver in the world to do it faster with a manual transmission.
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Old 11-19-12, 10:16 AM
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Hell, I had a cruiser that had auto shift capabilities with its internally geared 3 speed hub. It's not shocking that someone would try to do this with Di2.
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