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Category: | Rear Derailleurs |
Name: | Simplex Juy 51 (similar version with no 51 markings) |
Brand: | Simplex |
Model: | Juy 51 (no Juy 51 markings) |
Years: | 1940's - 1950's |
Country: | France |
Added By: | Retroryder on 03/06/24 |
Updated By: | Retroryder on 03/06/24 |
Additional Photos - click for full size |
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Verify Component Photos |
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Outer Plate Markings | LE SI.PLEX MADE IN FRANCE | Inner Plate Markings | |
Material | Steel | Design Category | Chain Pull |
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.