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| Category: | Rear Derailleurs |
| Name: | Simplex LJ4000 CP (version 3) |
| Brand: | Simplex |
| Model: | LJ4000 CP |
| Years: | 1985 - 1990 |
| Country: | France |
| Weight: | 181 grams (Spec) |
| Added By: | JFischer on 12/01/09 |
| Updated By: | peterbman on 03/14/16 |
Additional Photos - click for full size |
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| Outer Plate Markings | Simplex | Inner Plate Markings | Simplex Super LJ |
| Material | Aluminum Alloy; Plastic | Design Category | |
| Attachment Bolt Size | | Cable Attachment Bolt Size | |
| Shifting Systems | Friction | Cable Adjuster | No |
| Cage Length | Medium | Max Cog Size | 30 |
| Max Chain Wrap | 30T | | |
| Component Variations | View Detailed List Manage Variations |
| Variations of Component exist (Component is 1 of 4) | Brand | Group |
| Gipiemme Dual Sprint | Gipiemme | Dual Sprint |
| Simplex LJ4000 CP (version 1) | Simplex | |
| Simplex LJ4000 T (version 3) | Simplex | |
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.
