Shimano Braze-on Front Derailleur Bolt and Washer Description: The Shimano Braze-on Front Derailleur Bolt and Washer is a factory replacement part that is designed to attach a road or gravel bike style braze on front derailleur to the braze on front derailleur mount on a bicycle frame. The radius washer will allow for some adjustability to the angle of the front derailleur for optimum driveline clearance and shifting performance. Compatibility: 11-Speed Shimano Ultegra FD-6800 Brazed-On Front Derailleur 11-Speed Shimano GRX FD-RX810 Brazed-On Front Derailleur 11-Speed Shimano GRX FD-RX820 Brazed-On Front Derailleur 11-Speed Shimano Ultegra FD-8000 Brazed-On Front Derailleur 11-Speed Shimano Dura-Ace FD-9000 Brazed-On Front Derailleur