Simplex SX A22
Main Photo
Category:  Front Derailleurs
Name:  Simplex SX A22
Brand:  Simplex
Model:  SX A22
Years:  1977 - 1983
Country:  France
Weight:  118 grams (Actual)
Added By: qd-s on 12/19/13
Updated By: peterbman on 03/13/16
Additional Photos - click for full size
Simplex SX A22Simplex SX A22Simplex SX A22Simplex SX A22
 Verify Component Photos
# Rings Designed For DoubleOuter Plate MarkingsSimplex sun logo, three cutouts
Inner Plate MarkingsBrevete Made in FranceClamp MarkingsSIMPLEX Brevete Made in France
Inner Clamp MarkingsDesign CategoryParallelogram
Pivot Arm MarkingsPlate MaterialChrome plated steel
Clamp Style28.0 mm Clamp; 28.6mm ClampCable Attachment Bolt8mm Wrench
CableStop YesClamp Bolt Type8mm Wrench;
Flat Head Scewdriver
Max Ring Difference 14T  
General Information
Shown in 1981 Simplex catalog, and apparently in catalogs 1980-1982 (see comment by user "simplex56" on Simplex SX A 32).
The black material is Delrin (plastic).
Shown in 1981 catalog is also triple chainring version SX A 23.

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Additional Resources
Resources:Reference & ChartsCatalogsExternal Resources
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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