Shimano Dura Ace 11s Downtube Shifter (hack)

[GregL]

Thanks for posting your work. Very much appreciated. Now I'm looking forward to the next installment - DA 7700 rear hub modification for 11-speed!

- Greg

[Ti Designs]

Originally Posted by Look585

Yep, it is easy to make auxiliary Di2 buttons and stick them somewhere, but the vestigial DT shifter mounts on your old steel (or Ti!) frame will still look silly.

Sometimes you want to do something that cannot be done.

First, I don't do anything that poorly. Second, almost everything I want cannot be done, that's what makes it fun...

I have a camera mounted on my fixed gear, since I only have a front brake the right side brake lever was available for camera control. Pull the lever half way and it focuses, pull it all the way and it takes the picture. The camera is a Panasonic Lumix G3, so it only took 3 resistors and two micro switches, but my point is that it looks like a brake lever and works like a cable release. Making a down tube shifter that works with Di2 would mean making a shifter that has a spring return from a set position, with a switch in either direction. With SPDT information, the rest of the shifter can be put elsewhere...

[Mr_Gimby]

Originally Posted by stien

Convert the 6s lever to 11s?

Ohhh, I see. Well then, Carry on!

[Look585]

Originally Posted by Ti Designs

First, I don't do anything that poorly. Second, almost everything I want cannot be done, that's what makes it fun...

I have a camera mounted on my fixed gear, since I only have a front brake the right side brake lever was available for camera control. Pull the lever half way and it focuses, pull it all the way and it takes the picture. The camera is a Panasonic Lumix G3, so it only took 3 resistors and two micro switches, but my point is that it looks like a brake lever and works like a cable release. Making a down tube shifter that works with Di2 would mean making a shifter that has a spring return from a set position, with a switch in either direction. With SPDT information, the rest of the shifter can be put elsewhere...

Wow, I was thinking *way* too small. I think I see your vision.

Kind of "paddle shifters" for downtube Di2? Traditional levers with "return-to-center" springs and momentary-off-momentary circuitry to enact shifts?

Push right lever = shift rear mech down stack
Pull right lever = shift rear mech up stack
Push left lever = shift to little ring
Pull left lever = shift to big ring

I'd buy this!

[hollowgram5]

Originally Posted by Look585

Wow, I was thinking *way* too small. I think I see your vision.

Kind of "paddle shifters" for downtube Di2? Traditional levers with "return-to-center" springs and momentary-off-momentary circuitry to enact shifts?

Push right lever = shift rear mech down stack
Pull right lever = shift rear mech up stack
Push left lever = shift to little ring
Pull left lever = shift to big ring

I'd buy this!

I'd be interested in this as well. Sounds awesome!

[AllanVarcoe]

Oh no, don't show me this! This may be just enough of a push to convert my old Bridgestone to a 10sp! Ha!

[Vinci]

Originally Posted by Look585

Wow, I was thinking *way* too small. I think I see your vision.

Kind of "paddle shifters" for downtube Di2? Traditional levers with "return-to-center" springs and momentary-off-momentary circuitry to enact shifts?

Push right lever = shift rear mech down stack
Pull right lever = shift rear mech up stack
Push left lever = shift to little ring
Pull left lever = shift to big ring

I'd buy this!

Making that work probably wouldn't be too tough. Making it look like a DT shifter might be a trick...

[cp43]

Originally Posted by AllanVarcoe

Oh no, don't show me this! This may be just enough of a push to convert my old Bridgestone to a 10sp! Ha!

You don't need to do any of this to get to 10 speed, you can still buy 10 speed downtube shifters (for Shimano at least):

http://www.aebike.com/Shimano-Dura-A...s_p_19049.html

[Mike V]

Originally Posted by GregL

Thanks for posting your work. Very much appreciated. Now I'm looking forward to the next installment - DA 7700 rear hub modification for 11-speed!

- Greg

I asked about that in another post but never got a reply.


MV

[onsight512]

very cool. thanks for sharing that!

[inouecchi]

Originally Posted by Vinci

Making that work probably wouldn't be too tough. Making it look like a DT shifter might be a trick...

I made Di2 downtube shifters based on the toggle switch.
https://youtu.be/QOA7ENnLUuw

I also made another type of retro electric downtube shifters.
https://youtu.be/FYhrPh0-uGg

[Louis]

Originally Posted by Look585

For ~$10 and some dremel time, they could have re-profiled some "radiused" DT shifter boss covers and achieved a better aesthetic. Details!

Yeah, it really stinks that these aren't available for larger DT diameters. I hate the look of the "flat" ones.

[blakcloud]

Originally Posted by inouecchi

I made Di2 downtube shifters based on the toggle switch.
https://youtu.be/QOA7ENnLUuw

I also made another type of retro electric downtube shifters.
https://youtu.be/FYhrPh0-uGg

This is brilliant. Thanks for sharing.

[R3awak3n]

I agree! Brilliant

[boywander]

Originally Posted by inouecchi

I made Di2 downtube shifters based on the toggle switch.
https://youtu.be/QOA7ENnLUuw

I also made another type of retro electric downtube shifters.
https://youtu.be/FYhrPh0-uGg

That is awesome that you retrofit a servo to the Campag centaur rear derailleur in the second video! Where is the receiver control module?