Can Di2 wireless unit be placed inside the frame?

Discuss light weight issues concerning road bikes & parts.
Post Reply
vinuneuro
Posts: 103
Joined: Mon Mar 06, 2017 10:34 pm
Location: Chicago

by vinuneuro

I normally see it external. Maybe it can go next to junction box B in the downtube or in the seatube?
'16 Spec Diverge Expert

by Weenie


User avatar
IrrelevantD
Posts: 353
Joined: Sun Nov 29, 2015 5:47 pm
Location: Near DFW Airport

by IrrelevantD

vinuneuro wrote:
Thu Feb 01, 2018 5:53 pm
I normally see it external. Maybe it can go next to junction box B in the downtube or in the seatube?
YES. I have hidden the wireless inside the down tube on both a carbon and an aluminum frame and have had no issues with connectivity to my Garmin via ANT+, nor to my iphone via BT.
* There is a 70% chance that what you have just read has a peppering of cynicism or sarcasm and generally should not be taken seriously.
I'll leave it up to you to figure out the other 30%. If you are in any way offended, that's on you.

User avatar
madcow
Shop Owner
Posts: 3744
Joined: Sun Feb 06, 2005 4:22 pm
Location: Tucson, Az.
Contact:

by madcow

We do it regularly, along with putting the a junction inside the seatpost with the battery, if you have the right stem you can make an almost completely hidden system without needing any internal routing on the bars and stem. Here's a moots ti frame where we put the transmitter inside and it works just fine you can see in the pictures most wires are able to be completely hidden. http://blog.fairwheelbikes.com/2017/12/ ... -di2-disc/

User avatar
TonyM
Posts: 2621
Joined: Thu Jan 22, 2015 4:11 pm

by TonyM

Yepp in the frame ok - except if you have a steel frame as stated from Shimano.

Stueys
Posts: 200
Joined: Sat Nov 22, 2014 1:12 pm

by Stueys

Interesting. I guess the main downside is you can't index the gears on the fly? Otherwise it's a good idea

spdntrxi
Posts: 1901
Joined: Sat Jul 20, 2013 6:11 pm

by spdntrxi

Yes.. I had mine in the seat tube with the battery (parlee z5i)

rsantos450
Posts: 25
Joined: Sun Feb 01, 2015 9:59 pm

by rsantos450

Mine is inside the SL6, works fine.

kode54
Posts: 1292
Joined: Tue May 23, 2006 9:39 pm

by kode54

madcow wrote:
Thu Feb 01, 2018 6:14 pm
We do it regularly, along with putting the a junction inside the seatpost with the battery, if you have the right stem you can make an almost completely hidden system without needing any internal routing on the bars and stem. Here's a moots ti frame where we put the transmitter inside and it works just fine you can see in the pictures most wires are able to be completely hidden. http://blog.fairwheelbikes.com/2017/12/ ... -di2-disc/
madcow, it says on your link that you have another A junction that you use to charge with. is it possible to connect 2 A junctions to do this? sounds like a great way to hide the A junction which i hardly use. only to charge and after initial adjustments.
- AX Lightness Vial EVO D + DA9150 + Enve SES 4.5 carbon hubs
- Parlee Altum + DA9150 + Enve SES 4.5 carbon hubs
- Parlee ESX + DA9150 + THM SRM PM + Enve SES 6.7 CK hubs
- Guru Praemio R Titanium + DA9150 + Enve 3.4 CK hubs

bikehaus
Posts: 6
Joined: Fri Apr 01, 2016 12:47 pm

by bikehaus

How does the wireless unit and battery get wired and fit around the seatpost area? I have a Ti frame and am consideing this.

2old4this
Posts: 359
Joined: Mon Jan 13, 2014 7:26 am

by 2old4this

bikehaus wrote:
Tue Jul 24, 2018 7:54 am
How does the wireless unit and battery get wired and fit around the seatpost area? I have a Ti frame and am consideing this.
Assuming your frame can be wired internally, you can put your battery inside the seat tube and secure it with something like this
https://www.amazon.com/Ritchey-Seatpost ... dpSrc=srch

Then all you have to do is to connect your wireless unit to the battery with a short di2 wire (10 cm?) and the other end of the wireless unit to the rest of the system...

bikehaus
Posts: 6
Joined: Fri Apr 01, 2016 12:47 pm

by bikehaus

I should have been more clear - can the wireless unit transmit through titanium downtube? I heard it cannot through steel and I am not smart about these materials. If not, I was then wondering then how you squeeze a battery and unit all within the seatpost area, in my case an aluminium one - and not the downtube area.

2old4this
Posts: 359
Joined: Mon Jan 13, 2014 7:26 am

by 2old4this

bikehaus wrote:
Tue Jul 24, 2018 8:05 pm
I should have been more clear - can the wireless unit transmit through titanium downtube? I heard it cannot through steel and I am not smart about these materials. If not, I was then wondering then how you squeeze a battery and unit all within the seatpost area, in my case an aluminium one - and not the downtube area.
I guess it all depends. I had to move the wireless unit from seattube to bottom bracket to way up in the downtube. Finally, took the unit out and tied it under the JuncA on the stem (this is a carbon Storck frame. :noidea: )

Then again, if you want hidden, if all fails, you can place the wireless unit inside the handlebar...

Robbie84
Posts: 2
Joined: Thu Jul 26, 2018 9:01 pm

by Robbie84

I have placed mine in the left bar end connected to the left shifter (only one end of the wireless unit needs to be plugged in). I have the Pro Vibe Aero carbon bars that are designed for internal wiring, and the bar-end junction box in the right side. One Di2 wire is then heat-shrunk to the rear hydro hose to the b junction at the bb.

by Weenie


Post Reply
  • Similar Topics
    Replies
    Views
    Last post