Front

Exceptional front shifting performance for large-wheel mountain bikes. Tackle trails with this Shimano CUES FD-U6000 front derailleur's smooth and quiet shifting. It is compatible with 2x11 and 2x10-speed drivetrains. - Smooth and quiet shifting on and off the trail - Provides and extra-wide range with front double - Offers wider tire clearance - Works with 48.8 - 51.8mm chainlines - 64-69 degree chainstay angle

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 - 61-66 degree chainstay angle - Includes 1 SD300 port

R8 front derailleurs feature a cold forged aluminum body and are optimized for 7 and 8-speed chains and Shimano-compatible road shifters.