Mechanical or electronic: Mechanical. Brake type: Rim brake, standard center mount. Rear derailleur: Short cage. What’s included: Shifters (Super Record 11), front derailleur (Super Record 11 + chain catcher), rear derailleur (Super Record 11), brake calipers (Super Record Skeleton). Condition: Groupset is in good to fair cosmetic condition, components have been tested for functionality. Mechanic’s notes: Minor scuffing on shifters, minimal scuffing on calipers, minor chain wear on front derailleur, rear derailleur has been repaired with epoxy. We will do everything in our power to resolve the issue.