DIY Di2 sprint shifters

Discuss light weight issues concerning road bikes & parts.
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ms6073
Posts: 2583
Joined: Fri Jul 23, 2004 8:24 pm
Location: Houston, Texas

by ms6073

CallumRD1 wrote:
Tue Mar 13, 2018 5:31 pm
Does anyone know if this can be done in any way on the newer Ultegra 8070 or Dura Ace 9170 hydraulic Di2 shifters? As I understand it, they don't have the dedicated sprint shifter port but they do have a free normal port.
Since there are not dedicated sprint shifter ports, there is no way to effect the sprint shifter mod for the ST-R8070/R9170 shifters. What I did for our ST-R9170 equipped bikes was to add a set of Shimano SW-R9150 satellite shifters but this is a more pricey option as these satellite shifters can be used as standalone shifters, say for a single-speed hydro disc brake project.
Last edited by ms6073 on Tue Jun 12, 2018 8:36 pm, edited 1 time in total.
Michael - The Anaerobic Threshold is neither...

by Weenie


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rainerhq
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Location: Estonia

by rainerhq

@ ST-R8070/R9170:
But what about hacking climbing shifter SW-R600 (like here)? Climbing shifter will work in normal port.
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"Nothing compares to the simple pleasure of a bike ride"

CallumRD1
Posts: 132
Joined: Mon Apr 03, 2017 2:54 pm

by CallumRD1

ms6073 wrote:
Tue Jun 12, 2018 2:29 pm
CallumRD1 wrote:
Tue Mar 13, 2018 5:31 pm
Does anyone know if this can be done in any way on the newer Ultegra 8070 or Dura Ace 9170 hydraulic Di2 shifters? As I understand it, they don't have the dedicated sprint shifter port but they do have a free normal port.
Since there is not dedicated sprint shifter port, there is no way to effect the sprint shifter mod for the ST-R8070/R9170. What I did for our ST-R9170 equipped bikes was to add a set of Shimano SW-R9150 satellite shifters but this is a more pricey option as these satellite shifters can be used as standalone shifters, say for a single-speed hydro disc brake project.

I ended up taking it upon myself to deconstruct a climbing shifter to make a set of low profile satellite shifters. Details can be found here:
https://weightweenies.starbike.com/foru ... 3&t=151321

Cw75lea
Posts: 10
Joined: Thu Nov 08, 2018 1:16 am

by Cw75lea

Now that time has passed how did you like the membrane switches on the top tube? How did you make the connection from the e-tube leads to the membrane switch?

ogre357
Posts: 3
Joined: Sun Jan 13, 2019 12:39 pm

by ogre357

Does anyone have an update on this? Sagan runnign them on an Allez in the Tour down under? A Y-Split cable would free up 2 ports on both levers to be used with the sprint shifters.

ogre357
Posts: 3
Joined: Sun Jan 13, 2019 12:39 pm

by ogre357

Tried with a set of sprint shifters - wont work off the shelf.

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ms6073
Posts: 2583
Joined: Fri Jul 23, 2004 8:24 pm
Location: Houston, Texas

by ms6073

While not near as compact as the previous gen sprint shifters, I opted to use the SW--R9150 Remote Satellite shifters with DA ST-R9170 levers.
Michael - The Anaerobic Threshold is neither...

flavourflav
Posts: 8
Joined: Thu Dec 24, 2009 12:54 am

by flavourflav

I used Grouks method as well, however I placed the membrane switch vertically instead of under the handlebar,
I bought a normal e tube extension, cut it in half and stripped the wires. I then inserted each polarity into the connector of the membrane switch and fixed it with electrical tape.
Connected to the shifter, routed along the handlebar. The excess length I just folded back and forth. Put the handlebar tape over this and a little electrical tape over the edges (can take pictures if needed).
Not the cleanest, but functionally it's extraordinary. Love it.
Have used for over a year, although I have 6 extra switches in a drawer somewhere if some fail.
Cw75lea wrote:
Thu Nov 08, 2018 1:56 am
Now that time has passed how did you like the membrane switches on the top tube? How did you make the connection from the e-tube leads to the membrane switch?

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