-Wide link design : Wide pivot link for greater torsional rigidity improves shifting response and service life. -Hyperdrive compatible : The SG-X front derailleur & SG-X crankset provide a high-performance front drivetrain. -DUAL SIS front index shifting -Multi Clamp for 21.6mm and 31.9mm tube -Compatible with 44T and 48T top -DOWN SWING -66-69 degree.