Simplex Super LJ A500 AV.326
Main Photo
Category:  Front Derailleurs
Name:  Simplex Super LJ A500 AV.326
Brand:  Simplex
Primary Group:  Super LJ
Model:  AV.326 / SLJ A500
Years:  1973 - ?
Country:  France
Weight:  115 grams
Added By: JFischer on 11/30/07
Updated By: peterbman on 08/28/14
Additional Photos - click for full size
Simplex Super LJ A500  AV.326Simplex Super LJ A500  AV.326Simplex Super LJ A500  AV.326
# Rings Designed For DoubleOuter Plate MarkingsEight pointed star with S in the center
Inner Plate MarkingsS.B.D.B. Mod. Depose Made in FranceClamp MarkingsEight pointed star with S in center on front, LJ Super on the back
Inner Clamp MarkingsDesign CategoryParallelogram
Pivot Arm MarkingsSimplexPlate MaterialAluminum
Clamp Style28.6mm ClampCable Attachment Bolt8mm Wrench
CableStop YesClamp Bolt Type5mm Allen Key
Max Ring Difference 26T  
General Information
First version of the Super LJ derailleur: arm on the front, hollowed clamp axle working as a cable guide, "S"-engraved plate.  This one is a Super LJ for sure as it is case with the letters L.J and Super on the back side of the very beefy clamp area.  I"ve seen this derailleur in an October 72 suppliment catalog, which suggests it was released for the 73 model year.  I have also seen this derailleur marked as the SLJ A500 in the 9/1975 Simplex catalog.
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Additional Resources
Resources:Reference & ChartsCatalogsExternal Resources
Component VariationsView Detailed List  Manage Variations
Variations of Component exist (Component is 1 of 7)BrandGroup
Edco (SLJ rebadge)Edco
Gipiemme SpecialGipiemmeSpecial (Strada)
Simplex Super LJ A 522SimplexSuper LJ
Simplex Super LJSimplexSuper LJ
Simplex Super LJ (2nd version? with front control arm)SimplexSuper LJ
Simplex Super LJ (2nd version? with rear control arm)SimplexSuper LJ
Component Groups
Primary Group NameBrandQuick InfoBrowse Group Components
Super LJSimplexRoad RaceView 27 Components
Details:   The best of the Simplex lines of components.  Consisted primarily of Front and Rear Derailleurs as well as Shifters.  The SLJ designation was also given to other parts occasionally such as seat posts.
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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