Shimano Dura-Ace FD-R9250 Di2 Front Derailleur - 2x12-Speed | Braze-On Taillights worth a claimed 3 to

worth a claimed 3 to 6 watts of aero savings

A smart upgrade for riders who push their Formula brakes hard and won't compromise on stopping confidence

The dual-compartment layout helps separate wet or dirty items from dry gear

Not replacing it means chasing a shifting problem that no amount of cable tension will solve

Cassette lockrings require significant torque to install correctly and can be stubborn to remove when they've been seated through many miles

Shimano Dura-Ace FD-R9250 Di2 Front Derailleur - 2x12-Speed | Braze-On Taillights worth a claimed 3 toWhy Is the Shimano Dura Ace FD R9250 the Pinnacle of Front Shifting? The Shimano Dura Ace FD R9250 represents a complete redesign of what a front derailleur can be, shifting 45% faster than the previous generation FD R9150 while weighing under 100 grams and cutting frontal area by 33% for the most aerodynamic front derailleur Shimano has ever produced. As part of the semi wireless Di2 architecture of R9200, the FD R9250 wires to the BT DN300 battery