Tarmac SL6 Di2 Wire Lengths

Discuss light weight issues concerning road bikes & parts.
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Cdavies102
Posts: 37
Joined: Thu Jan 17, 2019 10:21 am

by Cdavies102

I'm just ordering up an Ultegra 8070 groupset for my 56cm SWorks Tarmac Disc frameset and could really do with some help with Di2 wire lengths that i'll require - can anyone help please?

I'll be running a EW-RS910 bar end junction within PRO Vibe 42mm bars.

I'm also looking to buy the IEWU-111 wireless transmitter too so maybe an option of lengths with or without that. If someone can provide me with rough lengths for everything I need that would be great. I'm happy to add a little extra lengths and use cable ties to stop the additional length rattling inside the frame.

Regarding junctions, will i just need one SM-JC41 Internal junction and one EW-JC130 Y-Split harness?

Thanks in advance.
Last edited by Cdavies102 on Mon Feb 25, 2019 11:53 am, edited 1 time in total.

Nefarious86
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by Nefarious86

I tend to go a bit long to make things easy, if you want to be gram conscious measure your frame and go a little shorter where you can.

I drew this up a few weeks ago for a mate making a 1x cross setup. Just add a 300mm wite for the front derailleur to the lower junction box.

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by Weenie


Cdavies102
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Joined: Thu Jan 17, 2019 10:21 am

by Cdavies102

This is a useful place to start, thanks bud!

I'll start making some notes soon and measure up those lengths against my frame tonight and post them up. Cheers!

ParisCarbon
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by ParisCarbon


moyboy
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by moyboy

Venge user manual has some good info on lengths..... for the back end.

https://media.specialized.com/support/c ... 104623.pdf

Cdavies102
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by Cdavies102

Thanks guys - that's handy. I've combined Nef86's drawing with some of the lengths on the above manuals (1000mm to battery and 500mm to FD). I'm sure they're excessive but the extra weight will be negligible and it may save me sorting replacements if they're too short. Thanks!

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C36
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by C36

That seems very long (just used 700mm for the Dow tube one on a t50 Supersix evo2).
Just realised that the junction box sitting that high on the seat post add quite some length (for info it’s 1g / 100mm)


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Nefarious86
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by Nefarious86

When it's a 58cm frame and your running the cable from the bb to inside the bars to hide the Bluetooth module using the y cable every mm extra is good.
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wheelsONfire
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by wheelsONfire

You should be able to get a "fair" measurement using laces checking (following the outside of the frame). If you feel unsecure, use some tape to fix the lace.
Bikes:

Ax Lightness Vial EVO Race (2018.12.21)
viewtopic.php?f=10&t=156137
Paduano Racing Fidia (kind of shelved)
Open *UP* (2016.04.14)


Ex bike; Vial EVO D

by Weenie


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