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Shimano Biopace ® Kettenblätter: Unterschied zwischen den Versionen

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Obiges Bild zeigt 48-38.28 Zähne Biopace Kettenblätter einer [[Dreifachkurbel]]. Man beachte, dass der kleinste Durchmesser in einem rechten Winkel zur Kurbel steht, so dass die Kurbel sich am schnellsten bewegen, wenn die Kurbeln horizontal - in der Mitte Bewegung mit der höchsten Kraft - stehen.
Obiges Bild zeigt 48-38.28 Zähne Biopace Kettenblätter einer [[Dreifachkurbel]]. Man beachte, dass der kleinste Durchmesser in einem rechten Winkel zur Kurbel steht, so dass die Kurbel sich am schnellsten bewegen, wenn die Kurbeln horizontal - in der Mitte Bewegung mit der höchsten Kraft - stehen.


===Wofür sind sie gedacht?===
===Geeignete Einsatzgebiete===
 
Biopace Kettenblätter sind vor allem für Reiseradler und Zeitfahrer oder jegliche Form des Fahrens, die einen gleichmäßige und recht konstante [[Kadenz]] erfordern, passend Sie ermöglichen gesünderes und  effizienteres Pedalieren bei geringen Kadenzen als bei runden Kettenblättern. Besonder geeignet sind sie für Triathleten und [[Mountainbike]]r. Triathleten profitieren, weil der Bewegungsablauf minimal näher am Laufen ist und den Übergang zum Laufen erleichtert.
Biopace chainwheels are particularly suitable for touring cyclists and time trialists, or any application that involves a steady, fairly constant cadence. They allow healthy, efficient pedaling at slower cadences than is possible with round chainwheels. They are especially suitable for triathletes and mountain bikers. The triathlete benefits because the motion is a little bit closer to that of running, making the transition easier.


Mountainbiker profitieren insbesondere, weil das Biopace Design die Kraftübertragung auf das Hinterrad glättet.
The mountain biker particularly benefits, because the Biopace design somewhat smooths out the delivery of power to the rear wheel. In climbing on loose surfaces, the limiting factor is often traction. The rear wheel tends to break loose during the maximum power phase of the pedal stroke, wasting most of the cyclist's energy. The Biopace chainwheel works like a storage device, storing power during the main power phase of the stroke as the feet accelerate, then delivering the stored power to the rear wheel during the "dead center" phase when the cranks are nearly vertical. The same average amount of power is delivered to the rear wheel, but in a smoother, less pulsating flow. The bicycle moves at a more even speed. All the energy is used to propel the bike forward, without the high-power peaks' spinning the rear tire or causing the bike to "wheelie."
The mountain biker particularly benefits, because the Biopace design somewhat smooths out the delivery of power to the rear wheel. In climbing on loose surfaces, the limiting factor is often traction. The rear wheel tends to break loose during the maximum power phase of the pedal stroke, wasting most of the cyclist's energy. The Biopace chainwheel works like a storage device, storing power during the main power phase of the stroke as the feet accelerate, then delivering the stored power to the rear wheel during the "dead center" phase when the cranks are nearly vertical. The same average amount of power is delivered to the rear wheel, but in a smoother, less pulsating flow. The bicycle moves at a more even speed. All the energy is used to propel the bike forward, without the high-power peaks' spinning the rear tire or causing the bike to "wheelie."


(A bicyclist may achieve a similar effect by leaning back to accelerate the bicycle when the cranks are vertical, then leaning forward during the power stroke, but this "pigeon walk" technique has a cost in efficiency and is not possible when spinning at high RPMs.)
(A bicyclist may achieve a similar effect by leaning back to accelerate the bicycle when the cranks are vertical, then leaning forward during the power stroke, but this "pigeon walk" technique has a cost in efficiency and is not possible when spinning at high RPMs.)
===Kadenzthemen===
===Kadenzthemen===


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