Pédalier offset
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Franck - Soprano du Dirtjump
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- Inscription : Dim Mai 01, 2005 6:49 pm
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par specialized27 » Lun Avr 03, 2006 9:48 pm
J'ai vu un article dans le MBAction qui parlait de ce type de cranks...
Si je me souviens bien, le MTB était visé mais encore à l'état de prototype.
Je retrouve l'article et je te reviens avec ça.
**EDIT**
C'est pas le MBA mais c'est officiel...le MTB peut en être équipé.
A Universal product
Rotor can be fitted to all the frames and accessories commercialised on the market, and is available in road (double and triple discs) and mountain bike versions.
Au prix qu'ils le vendent, ya pas mal juste des commandités qui peuvent se le permettre (900$+US pour le triple platinium!!!)
What is Rotor System and how does it work?
Rotor is an innovative pedalling system that eliminates the dead point. The dead point of conventional pedalling is the void that occurs when the pedals are vertically positioned (one at the top and the other at the bottom), which is a moment at which neither leg can transmit any power.
The dead point limits the cyclist's performance, causes tendonitis and injuries to the knee, as well as discontinuity in the traction.
Rotor System provides the definitive solution to this inefficiency, which is typical of conventional pedalling, by definitively eliminating dead points.
Rotor makes the cranks independent in such a way that they are not aligned at a fixed 180º, but rather the angle between them varies during the cycle in such a way that one pedal never coincides with the one below, thus avoiding power vacuums.
Such an effect is achieved by the use of independent cranks that are synchronised by means of an exocentric axel and two rods, which vary the development during the cycle and adapt to the muscle power of the legs at all times.
By eliminating the dead point, Rotor optimises the effort of the cyclist and reduces the risk of injury, providing a notable increase in performance and more comfortable and healthy pedalling.
The Benefits provided by Rotor System
By eliminating the dead point, the Rotor system maximises performance, as shown by scientific studies carried out by prestigious international universities. The results demonstrate that Rotor achieves a real increase in power of up to 16% (equivalent to an average advantage of 3 minutes in an hour), as well as a reduction in lactic acid and cardiac effort.
a) Reduction of lactates: Rotor reduces the concentration of lactates in the blood thanks to greater muscular efficiency, thus reducing fatigue.
b) Reduction of cardiac effort: Consequently, as a result of the reduction of lactates in the blood, cardiovascular demand is less.
c) Reduces knees injuries: Conventional pedalling subjects the knee to great articulatory stress when the leg is pushing on the upper dead point. By eliminating the dead point, Rotor reduces the typical knee injuries of the cyclist, due to less stress on the knee tendon. Thanks to the variation of the development during the cycle, the push is more progressive and the articulatory stress is more uniform.
J'aimerais beaucoup en faire l'essai.
Si je me souviens bien, le MTB était visé mais encore à l'état de prototype.
Je retrouve l'article et je te reviens avec ça.
**EDIT**
C'est pas le MBA mais c'est officiel...le MTB peut en être équipé.
A Universal product
Rotor can be fitted to all the frames and accessories commercialised on the market, and is available in road (double and triple discs) and mountain bike versions.
Au prix qu'ils le vendent, ya pas mal juste des commandités qui peuvent se le permettre (900$+US pour le triple platinium!!!)
What is Rotor System and how does it work?
Rotor is an innovative pedalling system that eliminates the dead point. The dead point of conventional pedalling is the void that occurs when the pedals are vertically positioned (one at the top and the other at the bottom), which is a moment at which neither leg can transmit any power.
The dead point limits the cyclist's performance, causes tendonitis and injuries to the knee, as well as discontinuity in the traction.
Rotor System provides the definitive solution to this inefficiency, which is typical of conventional pedalling, by definitively eliminating dead points.
Rotor makes the cranks independent in such a way that they are not aligned at a fixed 180º, but rather the angle between them varies during the cycle in such a way that one pedal never coincides with the one below, thus avoiding power vacuums.
Such an effect is achieved by the use of independent cranks that are synchronised by means of an exocentric axel and two rods, which vary the development during the cycle and adapt to the muscle power of the legs at all times.
By eliminating the dead point, Rotor optimises the effort of the cyclist and reduces the risk of injury, providing a notable increase in performance and more comfortable and healthy pedalling.
The Benefits provided by Rotor System
By eliminating the dead point, the Rotor system maximises performance, as shown by scientific studies carried out by prestigious international universities. The results demonstrate that Rotor achieves a real increase in power of up to 16% (equivalent to an average advantage of 3 minutes in an hour), as well as a reduction in lactic acid and cardiac effort.
a) Reduction of lactates: Rotor reduces the concentration of lactates in the blood thanks to greater muscular efficiency, thus reducing fatigue.
b) Reduction of cardiac effort: Consequently, as a result of the reduction of lactates in the blood, cardiovascular demand is less.
c) Reduces knees injuries: Conventional pedalling subjects the knee to great articulatory stress when the leg is pushing on the upper dead point. By eliminating the dead point, Rotor reduces the typical knee injuries of the cyclist, due to less stress on the knee tendon. Thanks to the variation of the development during the cycle, the push is more progressive and the articulatory stress is more uniform.
J'aimerais beaucoup en faire l'essai.
- specialized27
par BigJay » Mar Avr 04, 2006 12:27 pm
Je ne vois pas l'utiliter de ce genre de truc en vélo de montagne... la route est totalement différent au sens que c'est une position tout a fait statique. Tu assois tes fesses à un point X et tu pédales jusqu'a destination... tu te lèves 2-3 fois dans les grosses côtes ou pour qq sprint... Le reste du temps, tu pédales en position X. Donc, ton dead spot est présent un grand pourcentage de tes coups de pédales.
En montagne tu donnes 3-4 coup de pédales et tu tournes, penchent le bike, sort le pied, avances sur ta selle. 5-6 coup de pédales et oops tu te leves pour une tite drop... pédales encore... saute une roche et tu te remets en selle... Comme la position est tres active, tu ne ressent pas vraiment le dead spot...
J'pense que c'est un beau gadjet pour les roadies!
J'ai d'ailleurs parler longuement avec un ingénieur qui travaillait sur un pédalier de ce genre lors d'un salon... J'y ai pas trouver d'avantage... et ca fait longtemps qu'il travaille la-dessus... par la suite j'ai regarder les brevets a ce sujet... encore une fois, rien de palpitant pour une application de MTB...
En montagne tu donnes 3-4 coup de pédales et tu tournes, penchent le bike, sort le pied, avances sur ta selle. 5-6 coup de pédales et oops tu te leves pour une tite drop... pédales encore... saute une roche et tu te remets en selle... Comme la position est tres active, tu ne ressent pas vraiment le dead spot...
J'pense que c'est un beau gadjet pour les roadies!
J'ai d'ailleurs parler longuement avec un ingénieur qui travaillait sur un pédalier de ce genre lors d'un salon... J'y ai pas trouver d'avantage... et ca fait longtemps qu'il travaille la-dessus... par la suite j'ai regarder les brevets a ce sujet... encore une fois, rien de palpitant pour une application de MTB...
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