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Simplex 303 Tourist (earlier version)
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Category:  Rear Derailleurs
Name:  Simplex 303 Tourist (earlier version)
Brand:  Simplex
Model:  AR186 Ex
Years:  1954 - 1958
Country:  France
Added By: peterbman on 05/02/14
Updated By: peterbman on 12/26/15
Additional Photos - click for full size
Simplex 303 Tourist (earlier version)Simplex 303 Tourist (earlier version)Simplex 303 Tourist (earlier version)Simplex 303 Tourist (earlier version)Simplex 303 Tourist (earlier version)Simplex 303 Tourist (earlier version)
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Outer Plate MarkingsSIMPLEX JUY BTE SGDGInner Plate Markings
MaterialSteelDesign CategoryRod
Attachment Bolt SizeCable Attachment Bolt Size
Shifting SystemsCable Adjuster
Cage LengthMax Cog Size
Max Chain Wrap  
General Information
Earlier Simplex stamped logo version of the Simplex 303 Tourist chrome steel touring rear derailleur with steel pulleys with no teeth. This earlier Simplex stamped logo version appears in the 1957 Simplex catalog. Outer side of derailleur pulley cage around the upper pulley says " "303.T" TYPE "RIGIDEX 35". The outer side of the pulley arm says "SIMPLEX LJ BREVETE SGDB". Inner side of derailleur pulley cage around the upper pulley says "MADE IN FRANCE" and the number of speeds and chain width. According to "The Dancing Chain" by Frank Berto, 1st ed., p. 144 and p.175, it had a total capacity of 34 teeth and could handle a 14-28 tooth freewheel, and a chainwheel difference of 20 teeth. The 1960 Simplex catalog says it covers 3-4 speed freewheels with 1/8" chain and 4-5 speed freewheels for 3/32" chain
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Resources:Reference & ChartsCatalogsExternal Resources
Brand Information(click to expand)

Known for their black plastic (Delrin) derailleurs during the "bike boom" of the 1970's, they were at the forefront of innovation over the years, producing such highly regarded items as the Super LJ derailleurs, Retrofriction shifters, and very popular line of seat posts.

 
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