http://www.dhnet.be/sports/cyclisme/article/346653/le-vrai-secret-du-velo-de-cancellara.html
Test effettuati alla presenza di diversi atleti, commissari, e tecnici specialisti a fine 2010, velodromo di Montichiari, con Srm montato. Il tutto certificato e sottoscritto, rispetto ai migliori prodotti di gamma che il mercato offre:
- Aumenta del 95% la scorrevolezza della tua bicicletta
- Forte riduzione di ogni attrito tra parti meccaniche
- Diminuisce del 27% l'accumulo di acido lattico
- Ogni Km percorso a parità di potenza espressa, si ha un guadagno di 2,5 secondi
Da provare per poter credere, ne resterete abbagliati...
1100 € per la sua macchina
http://www.cecchiniteam.it/wms/ruote-bici
http://www.facebook.com/pages/GOLD-RACE/138998942829437
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la clave de los éxitos de cancellara está en los rodamientos
El secreto de 'Espartaco'
* · Un ingeniero italiano le diseña las ruedas y el pedalier · Así reduce hasta un 95% los rozamientos y disminuye un 27% el ácido láctico · Gana más de dos segundos por km
JOSU GARAI 17/03/11 - 17:36.
Las victorias de Fabian Cancellara, el mejor contrarrelojista del mundo, no dejan de causar asombro. El año pasado fueron objeto de estudio y algunos llegaron a la conclusión de que se beneficiaba de los vatios suplementarios que ofrecía un motorcito escondido en los tubos del cuadro de su bicicleta, algo que nunca se ha podido demostrar.
DENIS MIGANI
"Cancellara nunca ha tenido motor, pero sí estos rodamientos"
Por el contrario, y pese a las medidas adoptadas por la UCI, que durante el Tour empleó un escáner para descubrir a los posibles tramposos, nunca ha dejado de ganar, arrasar mejor dicho, teniendo en cuenta las diferencias que suele sacar a sus rivales: 1:27 a Larsson y 2:30 a Tony Martin, la plata y el bronce del Mundial 2009, y 1:02 sobre Millar y 1:l2 sobre Martin en el de 2010.
Ahora, 12 meses después del rumor que tanto daño hizo a su imagen, el tema del motorcito, parece desvelarse su verdadero secreto: la utilización de unos rodamientos especiales, engrasados a su vez con un aceite único, que le permiten ganar hasta dos segundos y medio por kilómetro.
Eso es al menos lo que afirmaba ayer el periódico La Dernière Heure, a quien un mecánico italiano, amigo de Espartaco, había puesto en la pista: “Fabian jamás ha llevado un motor en su cuadro, pero dispone de un sistema de rodamientos único y revolucionario puesto a punto por un ingeniero”, decía Denis Migani, quien, según explica el periodista belga, guarda en su taller de Riccione, como si de auténticas joyas se trataran, dos maillots de Miguel Indurain.
“El sistema se llama Gold-Race”, prosigue Migani en La Dernière Heure, “y ha sido creado por el ingeniero y profesor universitario Giovanni Cecchini”, que por cierto nada tiene que ver con el preparador de igual apellido.
Cancellara, al parecer, puso como condición para trabajar con él ser el único ciclista profesional en emplear sus inventos. “Las bolas de los rodamientos son parcialmente de grafito y se engrasan con un aceite muy complejo cuya composición es secreta”, sigue explicando Migani. “Su mezcla cambia en función de la humedad y la temperatura”, por lo que la presencia de su inventor se hace casi obligada en las grandes citas.
Según se puede leer en la página de Internet del inventor, http://www.cecchiniteam.it, sus rodamientos reducen hasta en un 95% el rozamiento, disminuyen hasta un 27% el ácido láctico y consiguen una ventaja de hasta dos segundos y medio por kilómetro.
Por el módico precio de 1.100 euros, cualquiera puede tener este sistema legal en su bicicleta. Las piernas de Espartaco, sin embargo, no tienen precio.
http://www.marca.com/2011/03/17/ciclismo/1300379780.html
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* VeloNews Magazine
Why the latest Cancellara mechanical doping story is even more stupid than the first
* By Caley Fretz
* Published Mar 17th 2011 12:40 PM EDT — Updated Mar 18th 2011 9:12 AM EDT
Cancellara at the 2010 Paris-Roubaix. We don't think his bottom bracket bearings, no matter how good, made a lick of difference.
Once again, Fabian Cancellara is allegedly using extraordinary technology to outpace his competition. No motors this time. Rather, he is said to have used an advanced bearing technology developed by Italian mechanic Giovanni Cecchini called Gold-Race during his tenure at Saxo-Bank.
Brian Nygaard, manager of Leopard-Trek, has denied that Cancellara is using the system on his new team, though he acknowledged that he might have used it prior to this year.
Related:
* Cancellara calls motorized bikes claims ’stupid’
* UCI to check for hidden motors at Tour
* A look at Cancellara’s Paris-Roubaix bike
Belgian daily La Dernière Heure submitted that the Gold-Race bearings offer a substantial reduction in friction — saving as much as 2.5 seconds per kilometer. The report claims that Cancellara used the special bearing system in his hub, bottom bracket, and derailleur pulley bearings.
A video on dh.be shows a crank spinning effortlessly with only a quick push. Even more impressive is a quick shot of the outer shell of an outboard bottom bracket spinning freely, and quickly — a feat most mass-produced BB sets could never replicate.
Cecchini’s own website explains that the bottom bracket uses steel and ceramic hybrid bearings, improved race geometry and advanced seals that produce almost zero friction. La Dernière Heure also notes that the lubrication for Cancellara’s bearings has to be optimized for climatic conditions, meaning it is likely extremely light and obviously requires regular maintenance.
So, the bearings system is obviously quite good, at least without any load applied. That much can be seen in the video. And we already know that simply moving to a high-quality ceramic bearing set can save about 10 percent in drivetrain efficiency.
But—
Bearing efficiency, both within the drivetrain and hubs, represents a very small portion of overall drag.
Claims of gaining 2.5 seconds per kilometer, or indeed that these bearings could be Cancellara’s secret weapon, are wildly overstated. Perhaps our own Lennard Zinn put it most succinctly in an email Thursday morning: “I think it’s a crock. Bearing friction, even if it were to be completely eliminated, could not grant 2.5 seconds/kilo.”
Consider Cancellara’s Tirreno-Adriatico time trial winning speed of a bit over 53kph. At that speed, he’s covering each kilometer in about 1 minute, 8 seconds. 2.5 seconds per kilometer is therefore equal to about a 3.7% gain.
High speeds (and I think it’s safe to say 53kph qualifies under that category) make bearing friction even less significant compared to aerodynamic drag, usually representing less than 2 percent of total drag (figures vary slightly depending on drivetrain and who’s doing the counting).
In fact, most of the frictional loss within the bicycle itself (not wind or rolling resistance) comes from the chain, which still accounts for a tiny percentage of total drag at race speeds.
All this isn’t to say drivetrain efficiency and bearing drag don’t matter. Every little bit counts, and a collection of small percentages can add up to a measurably more efficient machine. But to claim that a faster set of bearings is Cancellara’s secret weapon is about as plausible as claiming he’s powered by an electric motor. That is, it’s downright rubbish.
Maybe, just maybe, the guy is simply faster.
http://velonews.competitor.com/2011/03/bikes-and-tech/why-the-latest-cancellara-mechanical-doping-story-is-even-more-stupid-than-the-first_164067
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