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Category: | Rear Derailleurs |
Name: | Simplex Grand Prix Duralumin (D-shape lower pulley cage; steel pulleys, protruding pin on upper pulley cage) |
Brand: | Simplex |
Model: | Grand Prix |
Years: | Late 1930's - Late 1950's |
Country: | France |
Added By: | peterbman on 05/27/14 |
Updated By: | peterbman on 07/02/14 |
Additional Photos - click for full size |
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Verify Component Photos |
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Outer Plate Markings | Simplex Made in France | Inner Plate Markings | |
Material | Aluminum Alloy | Design Category | |
Attachment Bolt Size | | Cable Attachment Bolt Size | |
Shifting Systems | | Cable Adjuster | |
Cage Length | | Max Cog Size | |
Max Chain Wrap | | |   |
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.