| Component Groups |
| Primary Group Name | Brand | Quick Info | Browse Group Components |
| Super LJ | Simplex | Road Race | View 27 Components |
| Details: 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. |
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.
