Bürokraten, editor, Administratoren
15.322
Bearbeitungen
Shimano Biopace ® Kettenblätter: Unterschied zwischen den Versionen
Aus WikiPedalia
Shimano Biopace ® Kettenblätter (Quelltext anzeigen)
Version vom 11. Oktober 2021, 07:28 Uhr
, 11. Oktober 2021→Biopace: Noch ein Bild
(→Biopace: Bild hinzugefügt) |
(→Biopace: Noch ein Bild) |
||
| Zeile 11: | Zeile 11: | ||
==Biopace== | ==Biopace== | ||
[[File:Biopacesticker.jpg|left|thumb|Biopace Aufkleber]]Biopace is a patented non-round chainwheel design made and licensed by Shimano. To a casual glance, Biopace chainwheels resemble elliptical chainwheels, but on closer examination they turn out to be the opposite of the classical elliptical design. The product of extensive research and computer-aided design, Biopace chainwheels have the small radius engaged when the cranks are horizontal, the large when they are vertical. This is because the Biopace design is based on a dynamic analysis of the motion and momentum of moving cranks and legs, unlike the static, geometric analysis that produced classical ellipticals. | |||
Biopace | |||
The theory is that during the power stroke, when the cranks are more or less horizontal, you are using the power of your legs to accelerate your feet, which get going quite fast in the lower gear provided for that part of the stroke. The momentum of your feet then carries the pedals through the "dead spot" when the cranks are near vertical. Since the rider doesn't push as hard during the power phase of the stroke, and motion is slower when the leg is changing direction, the Biopace design is gentler on the knees than even round chainwheels. | The theory is that during the power stroke, when the cranks are more or less horizontal, you are using the power of your legs to accelerate your feet, which get going quite fast in the lower gear provided for that part of the stroke. The momentum of your feet then carries the pedals through the "dead spot" when the cranks are near vertical. Since the rider doesn't push as hard during the power phase of the stroke, and motion is slower when the leg is changing direction, the Biopace design is gentler on the knees than even round chainwheels. | ||
