Shimano Alivio FD-M3120-M-B Front Derailleur - 2x9-Speed Side Swing Front Pull 34.9/31.8/28.6mm Clamp Band 36t MaxShimano Alivio FD M3120 M B Front Derailleur 2x9 Speed Side Swing Front Pull 34. 9 31. 8 28. 6mm Clamp Band 36t Max. The Shimano Alivio FD M3120 Front Derailleur features side swing action for enhanced cable routing and smooth operation. For 2x9 drivetrains Chainstay angle: 64 69 degrees Chainline: 48. 8mm 51. 8mm TECH SPECS Double or Triple Double Drivetrain Speeds 9 Front Derailleur Clamp 31. 8 (1 1 4") Front Derailleur Clamp 34. 9 (1 3 8") Front