Which component giant introduced Indexed Shifting (SIS) in 1985?
Answer
Shimano
The long era of friction shifting, which required riders to use feel and sound to manually fine-tune chain placement, was brought to a close by the Japanese component manufacturer, Shimano. In 1985, Shimano launched its **Indexed Shifting** system, which was refined as the Shimano Indexing System (SIS). This was revolutionary because the shifters featured defined 'clicks' or pre-set positions. Each click corresponded exactly to a precise, fixed movement of the derailleur needed to align perfectly with the next cog, removing the guesswork and finesse previously required, thereby mandating system integration where indexed shifters and derailleurs had to be engineered together.
Related Questions
What crucial component did John Kemp Starley's 1885 Rover safety bicycle introduce?Which 1895 derailleur patent by Jean Loubeyre was deemed a technological dead-end?Who campaigned relentlessly for geared bikes, favoring the derailleur over hub gears, writing as "Vélocio"?What key feature defined Joanny Panel's manufacturable 1912 derailleur, 'Le Chemineau'?Until what year were derailleurs banned from use in the Tour de France?What technical feature did Campagnolo’s 1949 Gran Sport utilize for smoother shifts?Which component giant introduced Indexed Shifting (SIS) in 1985?What innovation did Shimano introduce in 1990 combining braking and shifting functions?Which company pioneered the concept of electronic shifting with their 1992 Zap system?What was the gear ratio limitation of the high-wheelers or penny-farthings before chain drives?What distinguished Edmund Hodgkinson's 1896 Gradient derailleur system?