Is it his radio? It looks like there’s a wire attached to it.
Or maybe it’s some kind electric motivational device shocking his behind? 
Edit: Picture taken from http://www.cervelo.com/tdf/p010_015.png
I agree. Wire to the gonads that delivers a jolt if his wattage drops below the Riis’s allowable lower limit…
SRM data transmitter
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more than that…it’s for a german channel that shows the tour and they can get Voigt’s HR live during the race.
Wow, that’s a purdy bike! Gerard–got a spare size 51?
The bag holds the receiver for his SRM data, I believe. And maybe the transponder they all have on their bikes?
clm
Wow, that’s a purdy bike! Gerard–got a spare size 51?
The bag holds the receiver for his SRM data, I believe. And maybe the transponder they all have on their bikes?
clm
posting twice the same stuff won’t get you a free carbon soloist cathy
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Does he look kind of big for that bike? Almost looks like his feet would hit the front tire if he turned really sharp.
And maybe the transponder they all have on their bikes?
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Transponders do not require a power scourse as they merely bounce the signal back to the transceiver, i.e. similar to that used in aircraft with radar.
I think the transponder is the little yellow thing on the back left
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Correct, that is it mounted on the left chainstay (painted yellow) awaiting the timing equipment to interrogate it and receive it’s ident.
Actually, I think he looks correct on that bike, while most people look like they are on bikes that are too big. Jens is a pretty tall guy nonetheless, but his angles and back look really good.
I hope we are seeing a trend towards people getting smaller bikes, especially for TT/triathlons. Way, way too many people are on bikes that are too big and they are all stretched out.
Jens Voigt is one of the guys that looks better on a road bike that I know of, it’s easy to pick him when you see live broadcasts. And like Gerard nce defended here, the feet hitting the front wheel is not such a big problem, it’s not like it’s a circus bike
Yes that’s best of 3 worlds. The stiffness and aero of a Soloist and the lightnesss of the carbon. At least that is what Cervello is promoting.
and notice how small the bike frame looks in relation to Jens frame. I reckon he looks pretty well fitted and it gives a hint of how good fit should be.
Just wondering…the sprint the other day that was decided by .0002 seconds as registered by this transponder. If one transponder is mounted closer to the front wheel then the other, even if by only 2mm…then this would have made a difference in the times registered and could account for an error in the .0002 winning margin. Yes…no…? And if they are all mounted in the same spot…how do they account for the longer wheel bases of larger bikes. I hope they are all mounted by measuring from the front wheel…and VERY accurately too!!
We use the same looking transponders for our road races here in Cincy. The race organizers measure from the front wheel to the transponder to be sure everyone’s is in the same place. I’m guessing if it is fairly accurate for local level stuff…le Tour is very precise!
That’s a very good question. I do howeve, know that the decision as to who won the sprint was decided by camera. The official enlarged the digital image until it was clear which tyre hit the line first. As it turned out he had to enlarge until the delineation was a single pixel!!
i’m sure those transponders are not accurate down to the mm level. that’s why they go with a visual determiner.
do you really think that military organizations would allow that kind of technology in the open market? it would be way to easy for someone of the right inclination to swipe on of them and use it for evil… PURE EVIL… 
Jens Voight’s bag,
The title was mis-read.
John Voight’s car,
Is what stuck in my head.
One sweet bike,
Its paint all black and red.
But alas,
The Seinfeld thread’s not dead.
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Not to be a nitpicker… but radar sets measure the return energy reflected off a target (i.e. an airplane). A transponder (i.e. aircraft type) requires a power source as it transmits a reply signal in response to an interrogation.