Simplex
Brand Directory
Country:FrancePrimary Focus:
Years of Operation:1928 - 1995
General Information

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.

History

First started with a 2 speed rear derailleur. Le Simplex was produced by Lucian Juy, ran a bike shop in Dijon.

they had numerous models over the years-
Tour de France
Juy 51
Juy 543
Record 60
Criterium
Prestige
Super LJ
Super Competition
Bankrupt in 1985 ,they have resurfaced a few times since then.

The marking "Brevete SDGD" = Patent Sans Garantie Du Gouvernement.  More explicitly SDGD patents are issued "without prior examination, at the peril of applicants, and without warranty of the reality, novelty or merit of the invention, the fidelity or the accuracy of the description. 
  

Components
View Search List by Category (# in Category)
View AllChainrings (5)Freewheels (2)Front Derailleurs (45)
Hubs (2)Rear Derailleurs (96)Seat Posts (5)Shifters (27)
Small Parts & Accessories (25)Stems (2)  
Recent Added / Updated Components
Component NameCategoryAdded / Updated
Simplex Rigidex 35 (steel pulleys; solid hanger)Rear Derailleurs04/23/2017
Simplex Rigidex 30 (plastic pulleys; wreath logo; solid hanger)Rear Derailleurs04/23/2017
Simplex Rigidex 35 (plastic pulleys; 3 point logo; solid hanger)Rear Derailleurs04/23/2017
Simplex Rigidex 35 (steel pulleys; rounded lower pulley cage; slotted hanger)Rear Derailleurs04/23/2017
Simplex Rigidex 35 (steel pulleys; rounded lower pulley cage; slotted hanger)Rear Derailleurs04/23/2017
Component Groups
Group Name - View DetailsQuick InfoView All Components
 - AlphaList 4 Components
 - CriteriumList 5 Components
 - JuyList 1 Components
 - PrestigeList 1 Components
 - SELEMATICRecreationList 2 Components
 - Serie SAList 2 Components
 - Silver RangeList 1 Components
 - Super LJRoad RaceList 21 Components
 - unknownList 1 Components
Frame Parts - Recent Added / Updated
NameCategoryAdded / Updated
Simplex 3480/3481Drop Outs & Fork Ends02/18/2017
Simplex 4266/4267Drop Outs & Fork Ends02/18/2017
Simplex 4264/4265Drop Outs & Fork Ends02/18/2017
Simplex S806Drop Outs & Fork Ends02/18/2017
search Simplex Frame Parts List
Photo Selection from Recently Updated Items
Additional Resources
Catalog NameSourceFile SizeDate Added
Simplex 1984 CatalogVeloBase2,615kB1/5/2009
Simplex Sept. 1975 CatalogVelo-Pages.comN/A12/1/2009
1982 Simplex CatalogVeloBase2,522kB11/4/2011
Resource LinkCategoryDetails 
Simplex collectionBrand Specific WebsitesCollection of Simplex parts, well photographed, with japanese descriptions.
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Rudge Whitworth
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