Simplex Super LJ (2nd version? with rear control arm)
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Category:  Front Derailleurs
Name:  Simplex Super LJ (2nd version? with rear control arm)
Brand:  Simplex
Primary Group:  Super LJ
Model:  Super LJ
Years:  Late 1970's - ?
Country:  France
Added By: Wolfram Verktyg on 07/30/09
Updated By: JFischer on 09/26/10
Additional Photos - click for full size
Simplex Super LJ (2nd version? with rear contSimplex Super LJ (2nd version? with rear contSimplex Super LJ (2nd version? with rear contSimplex Super LJ (2nd version? with rear contSimplex Super LJ (2nd version? with rear cont
# Rings Designed For DoubleOuter Plate MarkingsEight pointed star with S in the center
Inner Plate MarkingsBrevet Made in FranceClamp MarkingsEight pointed star with S in center on front, LJ SUPER on the back
Inner Clamp MarkingsDesign CategoryParallelogram
Pivot Arm MarkingsSimplexPlate MaterialChrome plated steel
Clamp Style28.6mm ClampCable Attachment Bolt8mm Wrench
CableStop NoClamp Bolt Type5mm Allen Key
Max Ring Difference   
General Information
This is one of the many variations of Simplex Super LJ front derailleurs. These were available with a silver or gold anodized finish. It has a riveted on cable control arm in the rear instead of on the front for use with Canpy style cable guides with the cable behind the seat tube.

This derailleur has a lip inside the front of the outside cage plate. This may be a US CPSC "safety" feature. It also helps prevent overshifts on the large chainring. The clamp bolt has a large flange on the bolt head, probably another CPSC concession.

The clamps on these derailleurs had a very fragile hinge joint and would crack if overtightened. Also the threads for the cable clamp screw on the control arm frequently stripped out. I had to use a nut on this cable clamp bolt.

Quality:Rarity:
 
 
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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 A500 AV.326SimplexSuper LJ
Simplex Super LJ A 522SimplexSuper LJ
Simplex Super LJSimplexSuper LJ
Simplex Super LJ (2nd version? with front 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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Rudge Whitworth
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