Shimano Deore FD-M4100-E Front Derailleur - 10-Speed Double Side Swing Front Pull E-Type Mount Silver/BLK MFPN=100-2323-007 4mm hex on the bolt

4mm hex on the bolt and 6mm on the nut

Color Black Ring Position/Type Chain Retaining Single Ring Tooth Count 42 Drivetrain Speeds 9 Drivetrain Speeds 10 Drivetrain Speeds 11 Drivetrain Speeds 12 Chainring BCD 110 Material Aluminum Defined Color Black

15mm Upper / 9

Comes with Shimano/SRAM compatible freehub body (Except SRAM XD and XDR)

Shimano Deore FD-M4100-E Front Derailleur - 10-Speed Double Side Swing Front Pull E-Type Mount Silver/BLK MFPN=100-2323-007 4mm hex on the boltShimano Deore FD M4100 E Front Derailleur 10 Speed Double Side Swing Front Pull E Type Mount Silver Black. The Shimano Deore FD M4100 Front Derailleur is designed for 2x10 drivetrains. TECH SPECS Double or Triple Double Drivetrain Speeds 10 Derailleur Capacity 10 Front Derailleur Clamp E Type Front Derailleur Cable Pull Front Pull Front Der Shifter Compatibility Shimano Mountain Max Ring (teeth) 38 Front Derailleur Style Side Swing