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Short answer: 1949.
Long answer: Bikes have had external multiple gears since the early 1900's (designs and patents go back to late 1800's!), starting off using chain-stay mounted rods, like the "Osgear", "Vittoria Margherita" and "Campagnolo Cambio Corsa", to push the chain across to different rear cogs.
Cable operated parallelogram derailleurs were invented in 1938 by the French company "Simplex". In 1949 Campagnolo refined this design with their "Gran Sport" rear derailleur. Of course, you can't have 10 speeds unless you can change your front chainrings. Also in 1948, Campagnolo invented the front derailleur and thus the dawn of the "10 speed", which became the "12 speed", "14 speed", "16 speed", etc.
Suntour improved and patented the derailleur design in 1964 with the "slant-parallelogram" which allowed for easier shifting, but patents expired so this design became wide spread and is what we use for derailleurs today. Shimano came out with SIS index shifting (1985, I believe) which required the user to buy all Shimano components for their drive train essentially crushing almost all of the competition (Suntour and Campagnolo had indexing drivetrains, but didn't monopolize on the technology the way Shimano did) in the bicycle component manufacturing field.
What else can I help you with?
How do you tell what year the Sears and Roebuck Ted Williams Free Spirit ten speed bicycle made?
Look it up on the interweb
What is the first ten browning guns?
Be more specific. The first ten he invented, or the first ten made by BAC?
How many kilograms are in a bicycle?
ten
How much matter does a ten-speed bicycle contain?
The easy answer would be that it's the same as its weight, which could be something between 9-13 kg.
How many possible outcomes are there for this event choosing a bicycle that has one speed three speeds or ten speeds that is either red blue green or black in color?
answer is 7
When were the first ten colonies settlements made?
They were made by the year 1653.
When was Ten Speed Press created?
Ten Speed Press was created in 1970.
What is the time period of the ten commandments?
First of all god made the ten commandments and it was not Moses.
What made up the first ten admendments to the Constitution?
The first 10 are the Bill of Rights.
How are speeding fines calculated in Massachusetts?
you are charged $100 dollars for the first 10MPH over the speed limit. Then you are charged $10 per MPH over after the first 10MPH. EXAMPLE: Speed limit:55 Your Speed:73 First ten: $100 + Everyone (8MPH*$10): $80 TOTAL: $180 you are charged $100 dollars for the first 10MPH over the speed limit. Then you are charged $10 per MPH over after the first 10MPH. EXAMPLE: Speed limit:55 Your Speed:73 First ten: $100 + Everyone (8MPH*$10): $80 TOTAL: $180
How do you correct the sentence ''he ride a yellow bike that gots ten speed?
he ride a yellow bike that hasten speed
What is The Bill of Rights made up of?
The first ten amendments to the Constitution--NovaNET:p
