R539 Front Derailleur Options:R539 Front Derailleur 9-Speed Triple 52/42/30T, Braze-On, Shimano Compatible FS3 Fit System & Occipital

FS3 Fit System & Occipital Base Adjustment optimizes comfort by personalizing fit to individual head shape

We tossed gravel geometry status quo out the window

The Specialized Offset model is most suitable for Specialized Turbo systems using the ISIS mount including: Levo

Compatible with RockShox Flight Attendant

while oversized carbon rails create a saddle that's ready for anything

R539 Front Derailleur Options:R539 Front Derailleur 9-Speed Triple 52/42/30T, Braze-On, Shimano Compatible FS3 Fit System & OccipitalFull metal construction provides stiffness and durability in this Shimano 9 speed road compatible front derailleur. Designed for use with 52 42 30t chainrings