Next component to introduce for the 12 speed Focus Paralane would be the Dura-Ace Di2 Front Derailleur, FD-R9250. There are some noticeable differences with the previous 11 speed front derailleur, we shall see what they are.
2x12 speed Di2 front derailleur
Comes with a plastic wire guide on the left, and the standard metal plate that sticks onto your frame, for the support bolt to push against. These are stored in a small paper bag inside the box, so don't throw them out accidentally.
Outer chain guide is anodised black, which is a new colour and looks very shiny. It is made of aluminium to save weight. Dura-Ace logo is big as well.
The inside of the outer chain guide is also black in colour, I wonder how long the surface treatment will last. Inner chain guide has a standard steel chain guide with nickel plating.
Most parts are black in colour, even the springs.
Front view of the derailleur, with hollow rivets used.
The outer link of the front derailleur is Z shaped, which is done to help make the front derailleur more compact. The pictures below will show that.
Rear view of the derailleur showing the linkages. Not really a parallelogram as seen from here.
Weighs just 95 grams! Very lightweight considering that it has a motor inside.
Side by side with the current front derailleur on the 2x11 speed Focus Paralane.
The Z shaped outer link is used to position the motor in a more compact position relative to the chain guide.
New front derailleur is shorter and more compact.
Difference in outer link design. Totally redesigned and not just a small construction change.
Front view of the derailleurs. Mounting bolt position seems different.
The previous front derailleur just manages to clear the mudguards. The new front derailleur should have no issue as well.
The biggest change to the front derailleur is the black colour chain guide, which really makes it look different. However, we shall see how long the surface treatment lasts, since the inside of the chain guide will rub on the chain during shifting.
Also, the Z shaped outer link enables a more compact construction, which gives a better overall appearance.
Later on during assembly, we shall see how it looks when mounted on the bike and against the chain rings.
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