Simplex SA12, Serie SA
Main Photo
Category:  Front Derailleurs
Name:  Simplex SA12, Serie SA
Brand:  Simplex
Primary Group:  Serie SA
Model:  SA12
Years:  1975 - 1981
Country:  France
Weight:  144 grams (Spec)
Added By: Tombo on 01/03/17
Updated By: tmundry67 on 04/02/18
Additional Photos - click for full size
Simplex SA12, Serie SASimplex SA12, Serie SASimplex SA12, Serie SASimplex SA12, Serie SASimplex SA12, Serie SASimplex SA12, Serie SA
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# Rings Designed For DoubleOuter Plate MarkingsSimplex
Inner Plate MarkingsnoneClamp MarkingsSimplex
Inner Clamp MarkingsnoneDesign Categoryhorizontal movement
Pivot Arm Markingsn/aPlate MaterialChrome plated steel
Clamp Style28.0 mm Clamp; 28.6mm ClampCable Attachment BoltScrew
CableStop YesClamp Bolt Type4mm Allen Key
Max Ring Difference 14T  
General Information
The SA 12 is vey similar to the SA 02 with just 2 slight variations. First, the metal arm which carries the cable stop is slightly different in that the cable stop element is directed to the front of the derailleur (to the backside with the SA 02). Second, the SA 12 has one additional adjustment screw and a slightly modified housing to build a port with a threading for that screw. It is located just underneath the red oil housing cap. With this additional screw its is possible to adjust/restrict the derailing cage horizontal movement in both directions (the other adjustment screw is the horizontal M3 screw at the opposite side of the housing. Generally, the SA 12 appears much rarer as compared to the frequently see SA 02. The pictures show an SA 12 from 1977 or 1978 with the typical design element of the brazed on circular platelet on the top right of the front plate.
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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
Simplex SA02, Serie SASimplexSerie SA
Component Groups
Primary Group NameBrandQuick InfoBrowse Group Components
Serie SASimplexView 2 Components
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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