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Simplex 303 Tourist (later version)
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Category:  Rear Derailleurs
Name:  Simplex 303 Tourist (later version)
Brand:  Simplex
Model:  AR186 Ex
Years:  1959 - Mid 1960's
Country:  France
Added By: JFischer on 01/21/09
Updated By: peterbman on 12/26/15
Additional Photos - click for full size
Simplex 303 Tourist (later version)Simplex 303 Tourist (later version)Simplex 303 Tourist (later version)Simplex 303 Tourist (later version)Simplex 303 Tourist (later version)
 Verify Component Photos
Outer Plate MarkingsSimplex logo on riveted badgeInner Plate Markings
MaterialSteelDesign CategoryRod
Attachment Bolt SizeClawCable Attachment Bolt Size
Shifting SystemsFrictionCable AdjusterNo
Cage LengthShortMax Cog Size28
Max Chain Wrap34T  
General Information
Later Simplex badge version of the Simplex 303 Tourist chrome steel touring rear derailleur with plastic toothed pulleys. The badge version is depicted in the 1960 Simplex catalog, and likely came out a year earlier with similar graphics on other Simplex parts. This later Simplex badge version may or may not have a hollow rivet pin on the outer circumference of the upper pulley cage. Outer side of derailleur pulley cage around the upper pulley says " "303.T" TYPE "RIGIDEX 35" "or simply "303.T". The outer side of the pulley arm says "SIMPLEX BREVETE SGDB" or a stamped Simplex logo. 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
Quality:Rarity:
 
 
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Additional Resources
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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