SHIMANO Dura Ace R9250 Di2 Front Derailleur 2 x 12s

Despite its smaller, lighter design, the DURA-ACE FD-R9250 brings our fastest front shifting. Our fastest just got faster thanks to the DURA-ACE FD-R9250. Tipping the scales under 100 grams, the new design shifts 45% quicker than Shimano´s FD-R9150, already our fastest. The frontal area of the FD-R9250 is also reduced decreasing aerodynamic drag. - Our fastest ever front shifting, 45% faster than FD-R9150 - Smaller, sleeker, lighter - Frontal area reduced by 33% - Weight cut to 96 g - Top gear teeth capacity: 50-55T Specifications: - Average weight: 96 - Action_Down Swing: Yes - Chain line (mm): 44.5 - Chain stay angle (deg.): 61 - 66 - Compatible chain: HG 12-speed - Firmware update by E-TUBE PROJECT: Yes - Link bushings: 4 - Mount_Brazed-On: Yes - Top gear teeth: 46-55T - Total capacity: 16T - Front speeds: 2 - Rear speeds: 12 - SD300 port (pcs): 1 Technology: E-Tube: - E-Tube Is Shimano´S “Service” That Uses Websites Or Apps To Maximize The Enjoyment Of Riding A Bicycle By Connecting The Riders, The Bicycles And Shimano. E-Tube Project Customizable Settings Off The Bike: - SHIMANO’s genuine application E-TUBE PROJECT for Mobile allows you to customize your bike, update firmware, and maintain it by connecting it wirelessly to your bike. You can also get the more detailed bike maintenance by connecting to your bike by wire with E-TUBE PROJECT for Windows V4 application. Hg Chain Design For Hyperglide+: - Hyperglide+ Dedicated Chain Delivers Greater Chain Retention, Improved Shifting Efficiency, And Smoother Transmission Over Rough Terrain. Benefits & Features: - Improved Chain Retention Encourages More Aggressive All-Terrain Riding And Relieves Chain-Issue Anxiety. Smoother Drivetrain Transmission And Enhanced Shifting Performance Sharpens Riders’ Concentration And Improves Acceleration. Better Chain Engagement Cuts Abrasion, Reduces Maintenance, And Lengthens The Lifespan Of The Chain. Hyperglide+ Revamped Hg Chain Features An Extended Inner Link Plate That Connects Seamlessly With New Chainring Tooth Shape For Ultra-Efficient Drivetrain Performance. This design change reduces the vibrations normally caused by the inner and outer chain plates rolling onto the chainring, and provides better chain engagement, stronger retention, and smoother pedaling.