Hacking the Heck Out of My Di2 9070

Discuss light weight issues concerning road bikes & parts.
Post Reply
Schulbub
Posts: 10
Joined: Fri Feb 15, 2013 8:29 pm

by Schulbub

Hi there,

I´d like to replicate the fabulous DIY solution shown here:

http://weightweenies.starbike.com/forum/viewtopic.php?f=10&t=87102&hilit=cateye+button
http://forum.slowtwitch.com/forum/Slowtwitch_Forums_C1/Triathlon_Forum_F1/DIY_Cervelo_P5_-_Di2_9070_Brake_Shifter_Hack__P4554409
and here
http://dinosarti.com/blog/2013/5/23/hacking-the-heck-out-of-my-di2-9070.

I´d like to use my Dura Ace 9070 together with the Magura RT 8 TT Brakes on my Shiv TriBike.
Unfortunately I can´t get any Cateye Remote buttons. Performance Bikes (https://www.performancebike.com/webapp/wcs/stores/servlet/CheckoutLogonView?catalogId=10551&langId=-1&storeId=10052&krypto=dRTCROKyT80mNDX4TU3f%2Bw%3D%3D&ddkey=http:RetailStoreLocatorInventoryView) seems unable to deliver to Germany.

Are there any alternatives to the Cateye-Buttons?

deltree
Posts: 198
Joined: Mon Apr 23, 2012 10:21 pm
Location: London, UK

by deltree

If you were just shifting the RD for out of the saddle efforts on the basebar, couldn't you just install R610 Sprint shifters?

maxxevv
Posts: 1954
Joined: Wed Feb 09, 2005 4:51 am

by maxxevv

The control circuitry in the 9070 is totally different from the 7970. You cannot hope to replicate the simple hacks done on the 7970. Unless you have some pretty sophisticated electronic engineering background to dupe the 9070 controllers.

And as said, get the R610 sprint buttons and hack from there. A whole lot less painful.

Schulbub
Posts: 10
Joined: Fri Feb 15, 2013 8:29 pm

by Schulbub

Thank you deltree and maxxevv for your replies. Both examples I posted used 9070 brifters. Please have a look here:
http://forum.slowtwitch.com/forum/Slowtwitch_Forums_C1/Triathlon_Forum_F1/DIY_Cervelo_P5_-_Di2_9070_Brake_Shifter_Hack__P4554409
and here:
http://dinosarti.com/blog/2013/5/23/hacking-the-heck-out-of-my-di2-9070.

Basically I´m searching some form of substitute for the CatEye Buttons.

User avatar
andy2
in the industry
Posts: 713
Joined: Sun Dec 16, 2007 9:33 pm
Location: Luxembourg / Sweden

by andy2

You need the handshake pcb for the e-tube system to do this. For this you need first to crack the e-tube protocol and then take it from there. Not impossible but somewhat time consuming. Best of luck!
rolobikes

Butcher
Shop Owner
Posts: 837
Joined: Sun Jan 03, 2010 4:58 am

by Butcher

I would be more than happy to get those buttons shipped to you. PM me.

maxxevv
Posts: 1954
Joined: Wed Feb 09, 2005 4:51 am

by maxxevv

Schulbub wrote:Thank you deltree and maxxevv for your replies. Both examples I posted used 9070 brifters. Please have a look here:
http://forum.slowtwitch.com/forum/Slowtwitch_Forums_C1/Triathlon_Forum_F1/DIY_Cervelo_P5_-_Di2_9070_Brake_Shifter_Hack__P4554409


Basically I´m searching some form of substitute for the CatEye Buttons.


If you're going the same route as that and using a donor shifter set for the requisite controller/ IC chip , well yes you can.

Image

glepore
Posts: 1090
Joined: Thu Mar 28, 2013 4:42 pm
Location: Pa USA

by glepore

Not meant as criticism, just curiousity-what do the cateye buttons achieve that the sprint buttons don't?
Cysco Ti custom Campy SR mechanical (6.9);Cannondale SS Evo Di2 7970 (5.79); Willier Cento Uno Air Di2 9070 (7.0); C40 Mk2 DA 7800 ; Anvil Custom steel Etap;1996 Colnago Technos Record

Butcher
Shop Owner
Posts: 837
Joined: Sun Jan 03, 2010 4:58 am

by Butcher

Not ever using the Sprinter buttons or anything else Shimano, my guess is that the Sprinter buttons operate the rear derailleur and he wants to have remote buttons that operate both front and rear.

Schulbub
Posts: 10
Joined: Fri Feb 15, 2013 8:29 pm

by Schulbub

AFAIK the sprint shifters use a dedicated port in the ST-9070 as the SW-9070 climber shifters. This port is absent in the ST-9071. Furthermore the wiring is not long enough to fit through the complete base bar.
So you have to cannibalize the brifters or SW-R671, put them in the basebar and solder some sort of buttons to the circuit board. Then you glue these buttons to the Magura brakes.

Image

glepore
Posts: 1090
Joined: Thu Mar 28, 2013 4:42 pm
Location: Pa USA

by glepore

Gotcha. I'd think about using a five port junction and splicing a longer wire, if that's a doable solution.

Edit, never mind, guess not. The "dedicated" port part probably means that the chip is in the brifter, not in the sprint buttons, which also explains why you can use the climbing shifters with Ultegra but not the sprint buttons (at least 6770, not clear about 6870).
Cysco Ti custom Campy SR mechanical (6.9);Cannondale SS Evo Di2 7970 (5.79); Willier Cento Uno Air Di2 9070 (7.0); C40 Mk2 DA 7800 ; Anvil Custom steel Etap;1996 Colnago Technos Record

Post Reply
  • Similar Topics
    Replies
    Views
    Last post