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SunTour Fahrradbauteile: Unterschied zwischen den Versionen

→‎Schalthebel: Übersetzngsanfang
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(→‎Schalthebel: Übersetzngsanfang)
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==Schalthebel==
==Schalthebel==


Sun Tour's innovations in shifters paralleled those in freewheels and derailers.
SunTours Erfindungen bei Schalthebeln verlief parallel zu denen von Schraubkranzfreiläufen und Schaltwerken.


Derailer-equipped bicycles in the 1960s and early 1970s usually had downtube shifters, which required removing one hand from the handlebar. Some low-end bicycles had handlebar-stem mounted shifters, which looked good to newbies but which offered no way to stabilize the hand against vibration. They also posed the risk of injury to sensitive pars of the body. Sun Tour had answers to these problems.
Fahrräder mit Kettenschaltung der 1960er und 1970er Jahre hatten üblicherweise [[Unterrohr]]schalthebel, die es erforderten, eine Hand vom [[Lenker]] zu nehmen, um den Gang zu wechseln. Einige einfache Fahrräder hatten am [[Vorbau]] montierte Schalthebel. Das sah für unerfahrene Fahrer gut aus, es gab aber keine Möglichkeit, die Hand gegen Vibrationen abzustützen. Zudem boten sie das Risiko, sich am empfindlichen Stellen des Körpers zu verletzen. Auf diese Probleme hatte SunTour Antworten:
===Barcons===
 
===[[Barcons ®]]/Lenkerendschalthebel===


Sun Tour Barcons (handlebar-end shifters) were the favored shifters for use with drop handlebars from the mid-1970s until the advent of index shifting in the late 1980s. These shifters allow precise control by wrapping the thumb and index finger around the handlebar end, operating the lever with the palm of the hand and the other fingers.
Sun Tour Barcons (handlebar-end shifters) were the favored shifters for use with drop handlebars from the mid-1970s until the advent of index shifting in the late 1980s. These shifters allow precise control by wrapping the thumb and index finger around the handlebar end, operating the lever with the palm of the hand and the other fingers.
===Power shifters===
 
===[[Power shifters]]===


Traditional shift levers held their position against the cable pull by friction of the cover plate against the lever body. Friction was controlled by screw, sometimes with a D-ring handle so it could be adjusted during riding. Tightening required a hard pull against both the friction and the cable's tension. The Barcons had a patented feature, a ratcheted assembly so the friction only counteracted loosening of the cable.
Traditional shift levers held their position against the cable pull by friction of the cover plate against the lever body. Friction was controlled by screw, sometimes with a D-ring handle so it could be adjusted during riding. Tightening required a hard pull against both the friction and the cable's tension. The Barcons had a patented feature, a ratcheted assembly so the friction only counteracted loosening of the cable.
===Daumeschalthebel===
 
===[[Daumeschalthebel]]===


What Barcons did for bicycles with drop bars, the Sun Tour thumb shifter, which mounted just inboard of the handlebar grips, did with flat bars. It conquered the mountain-bike market in the early 1980s.
What Barcons did for bicycles with drop bars, the Sun Tour thumb shifter, which mounted just inboard of the handlebar grips, did with flat bars. It conquered the mountain-bike market in the early 1980s.
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