Thought I'd put some info together on my Di2 build as the parts are all starting to come together 
As I've mentioned before the grand plan is to upgrade all 3 road bikes by cascading the groupsets down. The Bianchi will be getting Dura Ace R9170 Di2, the Roubaix will be getting the Ultegra R8020 and the Plug will be getting the Rival 22. I've already promised most of the Claris bits to a friend for the princely sum of twenty quid
I think I will end up with a spare set of wheels but thats about it (standard ones off a 2016 Charge Plug 2 if anyone wants them!).
Of course it's not quite that simple for various reasons - component sizes and fitments differ between frames etc, so I'm sure there will be bits that pop up that I haven't thought of along the way, but I'm aiming to get the Bianchi converted to electronic shifting next weekend if possible and go from there with the other two
I'm away with work monday to wednesday and then away again thursday and friday for the Goodwood festival of speed but should get time on Saturday and Sunday to spin some spanners!
So far I've got a nice little pile of bits building up in the garage; R9170 hydraulic STI levers, R9150 front and rear mechs, latest battery, junction boxes and wireless unit have all arrived safely
The first thing that struck me was how light it all is
I've also noticed that the STI's are significantly smaller than the Ultegra R8020's which will be a great improvement in terms of both comfort and looks
I do wonder though how much more we have to pay to get the Dura Ace stuff in shiny sleeved posh boxes compared to the plastic bag the Ultegra front mech I ordered came in 
First job was to mock up the wire routes - I used garden twine for this as I had it laying around in the garage
I had a few options for wiring routes but have decided to try and keep most of it hidden by using the bar end style junction box A. This has introduced a problem in that although advertised as being Di2 compatible my bars do not have an internal accessible route to the ends
It seems the bar end junction box was released after the bars were designed and nobody pre-empted the need for it. My options are a) buy new carbon aero bars or b) drill the current bars. I initially ruled out drilling a structural carbon part for very obvious reasons but the more I thought about it the more I started to change my mind... I've come up with the plan of running the wire externally until it's about 50mm from the end of the bar and drilling a small hole here on the underside to gain access to the rear of the junction box. I'll use some epoxy to dress the edges of the hole to try and prevent cracks propagating but I'm pretty comfortable that there's next to no load in this region so they'll be fine.
I've nearly convinced myself
Anyway here's the bianchi draped in garden twine that is nearly Celeste in colour by pure coincidence
The route I've settled on for now is:
- bar end junction box to the RH STI
- RH STI across to the LH STI
- LH STI to D-Fly wireless inline module
- D-Fly module to junction box B by bottom bracket and then 3 wires radiating out to battery, front and rear mechs.
I think this should work but once the cables arrive I'll connect it up on the desk for a dry run before I start taking anything to pieces just in case
I should point out this is my first foray in to the world of Di2 so please let me know if I've done or am planning to do something dim 

As I've mentioned before the grand plan is to upgrade all 3 road bikes by cascading the groupsets down. The Bianchi will be getting Dura Ace R9170 Di2, the Roubaix will be getting the Ultegra R8020 and the Plug will be getting the Rival 22. I've already promised most of the Claris bits to a friend for the princely sum of twenty quid

Of course it's not quite that simple for various reasons - component sizes and fitments differ between frames etc, so I'm sure there will be bits that pop up that I haven't thought of along the way, but I'm aiming to get the Bianchi converted to electronic shifting next weekend if possible and go from there with the other two

So far I've got a nice little pile of bits building up in the garage; R9170 hydraulic STI levers, R9150 front and rear mechs, latest battery, junction boxes and wireless unit have all arrived safely

The first thing that struck me was how light it all is



First job was to mock up the wire routes - I used garden twine for this as I had it laying around in the garage


I've nearly convinced myself

Anyway here's the bianchi draped in garden twine that is nearly Celeste in colour by pure coincidence

The route I've settled on for now is:
- bar end junction box to the RH STI
- RH STI across to the LH STI
- LH STI to D-Fly wireless inline module
- D-Fly module to junction box B by bottom bracket and then 3 wires radiating out to battery, front and rear mechs.
I think this should work but once the cables arrive I'll connect it up on the desk for a dry run before I start taking anything to pieces just in case

