General Discussion Triathlon Talk » Di2? who needs it Rss Feed  
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2011-12-03 12:22 AM

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Subject: Di2? who needs it

http://www.thepostgame.com/blog/pulse/201112/ring-my-bell-new-bike-reads-your-mind

Why bother with boring electronic shifting when you can have MIND CONTROL shifting???



2011-12-03 3:33 AM
in reply to: #3924450

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Subject: RE: Di2? who needs it

That sounds like it would be fun to play with.

 

2011-12-03 1:53 PM
in reply to: #3924450

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Subject: RE: Di2? who needs it
That's a very interesting concept. If someone found a way to provide feedback from the bike, like some kind of sensory input telling you what gear you're in and maybe what your tire pressure is, it'd really be like your bike is truly a part of your body.
2011-12-03 2:53 PM
in reply to: #3924450

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Subject: RE: Di2? who needs it

I think it is an interesting idea to have the brainwaves shift the gears directly, but sort of a gimmick. Once shifting is off the downtube and you don't have to move your hands away from the drops to shift, there is not much more to be gained in performance from shifting manually. 

I do think an automatic transmission is a better idea.  Using the basic existing measurements of inclination of the surface, speed, acceleration, power, and heart rate and a few parameters about the rider like LT and max power, it should be a simple algorithm to optimize the gear the bike should be in.  As the article indicates, the Prius-Parlee engineers are thinking about this type of advancement already.  If you added some experience from a training runs on the course to the automatic control algorithm, it would be a straightforward application of predictive control to tell the rider his optimum cadence too.  You could simply display that optimum cadence versus actual and the rider could simply match his pedal stroke to the optimum.

2011-12-03 7:57 PM
in reply to: #3924450

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Subject: RE: Di2? who needs it

The idea is intriguing, but it sounds like it may be more trouble than worth since you have to learn how to work the system.

I don't like the idea of an automatic shifting system on the bike.  I have disagrement on shifting points with every automatic car I've ever driven.

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