Hello everyone - I am looking for a way to hide the DI2 junction box in a stem so I can make my ride more aero or at least more “clean” looking.
Do you have any subjection, thoughts or pictures you can share?
Thank you
I put mine in/thru my aero bento box. Wires are easier to hide.
Road bike or TT?
I’m in the middle of drilling a hole large enough through my road bars to feed the wires into the open cavity in my stem. And then will feed a single wire out of the bars along the rear brake cable.
I’m using the Zipp Service Course SL stem and SL70 Aero drop bars.
2012 Trek Speed Concept 7.8
.
Don’t hide it too well. That is how you charge it or check the charge.
Don’t hide it too well. That is how you charge it or check the charge.
And get it into adjustment mode. Also take it out of crash mode.
Don’t hide it too well. That is how you charge it or check the charge.
And get it into adjustment mode. Also take it out of crash mode.
I’ve maybe made a single on the fly adjustment of my di2 over the last two years. And if it goes into crash mode, i’ll have plenty of time to get that sorted - never mind probably have other more pressing things to worry about.
Pity it’s not a 9. There’s enough room on the longer stems to fit inside 
To be honest I wouldn’t bother risking the integrity of the bars. Zip tied under the stem is not a bad place, or just put it in the frame under the cable bung if the cable lengths allow?
On the subject, will a 3-port EW-90 and a JC-41 (2+2 ports) both fit inside a TriRig Sigma XF stem?
On the subject, will a 3-port EW-90 and a JC-41 (2+2 ports) both fit inside a TriRig Sigma XF stem?
That is what I was wondering too. I know that they have a new one coming out soon but there is no mention of it on the matter.
Tri Rig did a post on this when they built up a bike. I believe it was a Felt B2 a year or two ago.
I just converted to Di2 last night, I replaced my stem with a 3T Integra Team which has a removable panel to stuff the junction and excess wire into.
Tri Rig did a post on this when they built up a bike. I believe it was a Felt B2 a year or two ago.
I recall seeing somewhere that a 5-port doesn’t, but a 3-port will. Was thinking of combining a 3-port and a JC-41 to get all cables from the front into the stem and then only one out. I suppose I will have to just get the parts and give it a go. I have the Sigma XF already.
What are you planning to use for a battery - internal or external? The SC has the Trek kit available for mounting the external battery under the bottom bracket. If you go with the external option I believe you can use the older Junction A box rather than the larger 3 or 5 port junctions which are necessary for charging the internal battery. You can use jc41 internal junction b’s in the bars to tie the bullhorn and extension shifters together. Then the smaller junction a can be put in or on the stem or under the cable entry to the top tube. Lots of wiring and placement options available with the e-tube di2.
I made an “integrated” aero pad platform, so custom pads that are linked in the center. The wiring junctions sit underneath attached to the stem and hidden.
I thought for a second about going at the stem, but that’s just not a good thing to do! Stem is too important to start hacking at it.
Then I velcro’d my little light/switch box to the top tube behind the steerer, all wiring drops into the frame cable holes, so it’s pretty clean.
I had a bento box in mind, but didn’t like the raggedy look of textile on the bike. (I am using leather for seat, pads and bars)
Hi WSRobert,
Are you happy with your solution?
Did the junction box + cables fit in the Zipp stem? How big of a hole did you drill in the bars?
Can you show a picture?
Thanks