Simplex Champion du Monde Monobloc 46 (chainstay mount)
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Category:  Rear Derailleurs
Name:  Simplex Champion du Monde Monobloc 46 (chainstay mount)
Brand:  Simplex
Model:  Champion du Monde
Years:  1946 - 1947
Country:  France
Added By: Catnap on 07/24/13
Updated By: peterbman on 11/05/14
Additional Photos - click for full size
Simplex Champion du Monde Monobloc 46 (chainsSimplex Champion du Monde Monobloc 46 (chainsSimplex Champion du Monde Monobloc 46 (chainsSimplex Champion du Monde Monobloc 46 (chains
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Outer Plate MarkingsLe Simplex - MADE IN FRANCEInner Plate Markings
MaterialAluminum Alloy; SteelDesign CategoryRod
Attachment Bolt SizeScrewdriverCable Attachment Bolt Size10mm Wrench
Shifting SystemsFrictionCable AdjusterNo
Cage LengthShortMax Cog Size
Max Chain Wrap  
General Information
Was renamed the Tour de France model after Robic's 1947 victory in the Tour de France. The pulley cage of the Champion du Monde Model 46 differs from the pulley cage of the Tour de France model. Chain stay mounted derailleur using a bell-chain style shift mechanism.  The spring that controls the horizontal movement also tensions the cage, very similar to the Simplex 303 chain stay mounted derailleur.   
Quality:Rarity:
 
 
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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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