Simplex SLJ5000
Main Photo
Category:  Rear Derailleurs
Name:  Simplex SLJ5000
Brand:  Simplex
Primary Group:  Super LJ
Model:  SLJ5000
Years:  1971 - 1978
Country:  France
Weight:  229.5 grams (avg)
View Weight List
Added By: CV-6 on 08/03/07
Updated By: peterbman on 03/14/16
Additional Photos - click for full size
Simplex SLJ5000Simplex SLJ5000Simplex SLJ5000
Outer Plate MarkingsSimplexInner Plate Markings
MaterialAluminum AlloyDesign CategoryInline parallelogram
Attachment Bolt SizeCable Attachment Bolt Size
Shifting SystemsFrictionCable AdjusterNo
Cage LengthShortMax Cog Size24
Max Chain Wrap26T  
General Information

The first version of the SLJ derailleur (SLJ CP). Chromed bolts, integrated cable-guide on the upper part. Silver or gold anodized version (see picture).  Also came in a T (Touring) and GT (Gran Touring) version.

Weight has been reported at both 182g and I personally weighed one in at 229g.

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Additional Resources
Resources:Reference & ChartsCatalogsExternal Resources
Component VariationsView Detailed List  Manage Variations
Variations of Component exist (Component is 1 of 2)BrandGroup
Spidel SLJ5000 (Simplex)Spidel
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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WeightSourceNotesAdded By
229 GramsUnknown bikeboombikes
230 GramsSpec JFischer
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