Shimano Dura-Ace FD-R9250 Di2 Front Derailleur - 2x12-Speed Braze-on Down Swing For 50-55t Max BLK/Silver MFPN=00.6718.045.000 5-45mm travel) 800lb Red

5-45mm travel) 800lb Red

}RockShox SID DebonAir Spring Shaft - 120mm 29" 32mm Stanchion air shaft and bumpers SID B4

Center drawers are 15

With Boost spacing and a wide internal rim width it supports modern tire profiles for better grip and control

Shimano Dura-Ace FD-R9250 Di2 Front Derailleur - 2x12-Speed Braze-on Down Swing For 50-55t Max BLK/Silver MFPN=00.6718.045.000 5-45mm travel) 800lb RedShimano Dura Ace FD R9250 Di2 Front Derailleur 2x12 Speed Braze on Down Swing For 50 55t Max Black Silver. Despite its smaller lighter design the Shimano Dura Ace FD R9250 offers ultra fast front shifting. Fast Di2 shifting performance Smaller sleeker lighter Frontal area is smaller than previous designs to reduce aerodynamic drag Top gear teeth capacity: 50 55t TECH SPECS Double or Triple Double Drivetrain Speeds 12 Derailleur Capacity 16 Front