Mechanical or electronic: Mechanical. Brake type: Rim brake. Rear derailleur: Short cage. What’s included: Shifters (Super Record 11), front derailleur (Super Record 11), rear derailleur (Super Record 11), calipers (Super Record Skeleton). Condition: Groupset is in great condition, components have been tested for functionality. Mechanic’s notes: Minimal scuffing on components. We will do everything in our power to resolve the issue.