SHIMANO DEORE M531 FRONT - CONVENTIONAL SWING - DUAL PULL - 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. Dual Pull. Multi Clamp. Compatible with 44T and 48T top.