| The best of the Simplex lines of components. Consisted primarily of Front and Rear Derailleurs as well as Shifters. The SLJ designation was also given to other parts occasionally such as seat posts. |
| Components | View Search List |
| Category | Photo | Name | Years | Added |
| Front Derailleurs |  | Simplex Super LJ | N/A | 10/21/07 |
| Front Derailleurs |  | Simplex Super LJ (2nd version? with front control arm) | Mid 1970's - ? | 07/30/09 |
| Front Derailleurs |  | Simplex Super LJ (2nd version? with rear control arm) | Late 1970's - ? | 07/30/09 |
| Front Derailleurs |  | Simplex Super LJ 503 (triple; first version) | N/A | 11/28/07 |
| Front Derailleurs |  | Simplex Super LJ 523 (triple) | Mid 1980's | 12/17/07 |
| Front Derailleurs |  | Simplex Super LJ 523 (triple; second version) | Early 1980's | 11/21/07 |
| Front Derailleurs |  | Simplex Super LJ A 522 | Mid 1980's | 11/04/07 |
| Front Derailleurs |  | Simplex Super LJ A500 AV.326 | 1973 - ? | 11/29/07 |
| Rear Derailleurs |  | Simplex SLJ SX660, Super LJ | N/A | 10/13/17 |
| Rear Derailleurs |  | Simplex SLJ5000 | 1971 - 1978 | 08/03/07 |
| Rear Derailleurs |  | Simplex SLJ5500 (version 1) | 1979 - 1984 | 07/06/07 |
| Rear Derailleurs |  | Simplex SLJ5500 GT (version 2) | 1985 - 1990 | 11/26/07 |
| Rear Derailleurs |  | Simplex SLJ6000 | 1975 - 1981 | 12/01/09 |
| Rear Derailleurs |  | Simplex SLJ6600 GT (long cage) | 1980's | 12/06/07 |
| Rear Derailleurs |  | Simplex SLJ6600 T (version 1) | 1981 - 1983 | 10/21/07 |
| Seat Posts |  | Simplex (blue label), SLJ | N/A | 02/04/08 |
| Seat Posts |  | Simplex Ref. TS3640 (black & gold badge), SLJ | Late 1960's - 1970's | 02/06/08 |
| Seat Posts |  | Simplex SLJ 6164 | N/A | 11/12/09 |
| Shifters |  | Simplex SLJ (1st type, double) | 1972 - 1973 | 03/14/18 |
| Shifters |  | Simplex SLJ (1st type, double, gold anodized) | 1972 - 1973 | 03/14/18 |
| Shifters |  | Simplex SLJ (1st type, single) | 1972 - 1973 | 03/13/18 |
| Shifters |  | Simplex SLJ (2nd type with nub on bottom of barrel, double) | 1973 - 1981 | 11/10/07 |
| Shifters |  | Simplex SLJ (2nd type with nub on bottom of barrel, double, gold anodized) | 1973 - 1981 | 03/14/18 |
| Shifters |  | Simplex SLJ (2nd type with nub on bottom of barrel, single) | 1973 - 1981 | 07/24/08 |
| Shifters |  | Simplex SLJ (3rd type, S logo on band) | 1981 - 1983 | 07/31/07 |
| Shifters |  | Simplex SLJ (4th type) | 1984 - 1985 | 03/13/18 |
| Shifters |  | Simplex SLJ (4th type, black anodized) | 1981 - 1983 | 11/24/10 |
