Build a 12-speed Di2 Time Trial / Triathlon bike
Building a 12-speed Di2 Time Trial (TT) or Triathlon bike isn't as straightforward as you might think. What components can you use, and how do you connect them?
Front Derailleur
DURA-ACE FD-R9250-F
The FD-R9250 is Shimano's new 12 speed Di2 Front Derailleur, to be used with the semi-wireless R9250 groupset.
It works with the BT-DN300 battery and EW-SD300 Electric Wire.
Wireless, but wired
Twelve-speed Di2 components are wireless, so what is a wire doing here? The new Di2 system is only semi-wireless, meaning that the derailleurs are still plugged into the battery, but the shifters send their shift commands wirelessly.
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Backward compatibility
This 12-speed front derailleur is meant to be used with a 12-speed road rear derailleur. It will not work with 11-speed derailleurs or MTB derailleurs.
Want to know more about 11-speed and 12-speed compatibility? Read my guide on 12-speed compatibility.
Specifications
- Model code: FD-R9250-F
- Series: DURA-ACE (R9200)
- Weight: 96g
- Speeds: 12
- SD300 ports: 1
- Total capacity: 16T
- Chain line: 44.5mm
- Top gear teeth: 50T - 54T
Related components
View all componentsRelated pages
12-speed Di2 New User Guide
Just bought a new 12-speed Di2 bike? This page explains what the buttons do, how to charge, and what synchronized shfit does.
12-speed Front Derailleur installation and adjustment guide
Twelve-speed Di2 Front Derailleurs do not have any limit bolts, so installing the derailleur and setting the limits is different from what you're used to. Don't worry, though, it's easy! I'll show you how to install the 12-speed Di2 front derailleur, and set its limits and micro-adjustment.
Manuals & other documents
Firmware updates
Below is an overview of all known firmware updates for this component. The changelog texts are Shimano's, and quite often they're a bit cryptic - sorry!
4.1.1
Bug fixes for an error that may occur in the adjustment operation.
4.1.0
EW-EX310 is now supported.
4.0.4
Bug fixes for an error that may occur in the adjustment operation.
4.0.3
Firmware released.
More images