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New to Di2, little help?

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New to Di2, little help?

Old 01-28-19, 12:27 PM
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LuMax
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New to Di2, little help?

I will be installing Di2 on my new Tarmac frame, this is my first electronic groupset.
My plan is to conceal as much of it inside the frame and bars as possible, and to only use what is necessary.
I found a few good YouTube videos which were very helpful.
I plan to use a EW-RS910 Bar End Junction Box and also a EW-WU111 Wireless Unit hidden inside the bars.
I think I can avoid having to purchase a EW-JC130 cable this way, and only the cable from the bars into the downtube will be visible (also the short front and rear mech connectors obviously).
Bars are Zipp SL-70 Aero, and I have verified that I can route the cables from LHS >< RHS, and through the drops.
The first 1:16 of this video shows what I have planed not including the WU111 (please stop watching at 1:18 when he starts drilling, I will NOT be drilling my bars).

Images were found on the Weight Weenie forum



Only item not shown here is the WU111



Any advice that you can offer, particularly pitfalls to avoid would be greatly appreciated.
Thanks!
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Old 01-28-19, 04:24 PM
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Le Mechanic
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It's all pretty straight forward. Bench test everything to make sure everything functions before you start routing wires. Make sure the firmware is updated on everything also. I made a video a few years ago on how to make a Di2 wire routing tool that makes geting the wires routed through the bars and frame easy work.

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Old 01-28-19, 07:10 PM
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Steve B.
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Likely only time consuming issue will be routing thru the b-bracket area. You will likely need to have a LBS pull your b-bracket if it's press fit, so you need to plan on that, then installing the R and F derailleur cables, battery cables and B junction, then back to the shop for the b-bracket install. Is why I like frames with BSA b-brackets as I can do the removal and install.

I was pondering a Workswell Chinese frame and am seeing a new b-bracket cover that allows access to the interior of the frame below the b-bracket, in theory to ease install of mechanical interior cabling as well as Di2 cables. Nice feature. Not sure if Tarmacs have that.

I put my 111 unit on a short E-Tube cable off the battery and let it dangle in the seat tube. Easier to reach if something fails. Some folks wrap in foam, I didn't bother and I don't hear rattle.

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Old 01-31-19, 11:29 AM
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Like Le Mech shows use a shifter cable inside a 5mm cable end ( fits right over the e-tube connectors) works great to route the cables through bars/tubes.

Other than the routing you should not have any problems it is an amazing system. For mine I tested everything on the bench installed it on the bike and it worked with no adjustments. The hardest part for me so far is remembering which lever to push for the gear change I want.
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Old 01-31-19, 02:26 PM
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Thanks for the help.
I ended up going with a different bar/stem, but the passageways in them are clear so running the wires should be easy.
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