Outer Plate Markings | Simplex Brevete SGDG | Inner Plate Markings | |
Material | Aluminum Alloy; Steel | 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.