The Front Derailleur Extender Adapter is designed to raise or lower the front derailleur position for better chainring compatibility and drivetrain adjustment.
The Extender-12S supports both raising and lowering adjustment, with a 15.5 mm extension length, fitting Shimano R7100 / R8100 / R9200, SRAM Rival D1 / Force D1 / Red D1 and QED.
