Di2 tuning

Discuss light weight issues concerning road bikes & parts.
callam
Posts: 84
Joined: Sat Dec 19, 2009 6:26 pm
Location: North Western Plains Germany

by callam

Defo think the next step is wireless maybe 5 yrs down the line, you'll need power sources at each point. I think battery power is the limiting factor at the minute and cost. I'll stick with SR for the time being.
Canyon Ultimate CF SLX Aero 09

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tochnics
Posts: 1155
Joined: Mon Apr 30, 2007 11:02 pm
Location: around amsterdam

by tochnics

i were rich i would trie the nexave 810 di2 on my bike
it has a automatich shifting function
proberly more heavy then a shimano sora drivetrain

i am running the 7900 ti clamps on my sr11 because the btp clamps would not fit snug on my tlo bar
i could of try filling the gap with rubber but its not worth it for me
Join the light side

a light bike does make you go faster unless you are slow

by Weenie


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mlchang
Posts: 142
Joined: Tue Dec 15, 2009 3:09 pm

by mlchang

Ari wrote:A bit over 3 oz of weight loss. Impressive work.

Might be easier to take a piss before a ride though :mrgreen:


But now he's got the lighter Di2 and then he takes a piss...now that's real weight savings!

sharky2000
Posts: 162
Joined: Thu Feb 23, 2006 10:24 pm

by sharky2000

I replaced the stock battery with a 220mAh lipo battery pack saving 96g. I initially used a 80mAh battery but found that under heavy shifting or repeated use of the FD the voltage drop caused the battery to think it was flat and stop working. A shame as the 80mAh battery was so compact.
I also swapped out the stock pad holders for KCNC. A massive weight saving of 24g mostly from Ti hardware. But I also swapped to Swissstop GHP2 which were 2g heavier than stock. Must admit the stock DA pads are very good. Don't notice much if any gains from Swissstop GHP2 but I don't do much wet riding which is where they are supposed to make massive difference.
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eigner
Posts: 1119
Joined: Tue Mar 24, 2009 12:36 am
Location: Denmark

by eigner

Nice. Can you tell us how you did the mod. What parts you used, etc? Where you got the stuff from.
Current: Colnago CX Zero Di2 Disc, Cannondale F29 carbon3
Previous: Scott Plasma 3 premium, Parlee Z3SL, Parlee Z4, Argon18 E112, TREK TTX7.0, S-Works Transition, Pinarello F4:13

sharky2000
Posts: 162
Joined: Thu Feb 23, 2006 10:24 pm

by sharky2000

The cells are Tenergy 220mAh http://www.batteriesinaflash.com/r-c-ho ... r-or-plane
You will need two to make the battery pack.
The connectors are EDAC
http://uk.rs-online.com/web/search/sear ... &x=17&y=19
http://uk.rs-online.com/web/search/sear ... &x=32&y=11
You will need one socket for the cell and two plugs - one for the Di2 connection and one for the charger.
Then you will need the help of an electrician to make the cell and enclose it in shrink wrap. Then cut off the stock Di2 battery adapter and solder on the new lead (this is tricky as the wires are very thin).
The battery pack weighs around 14g and I attached it to the frame with some velcro.
In theory it will last 40% of the life of the stock Di2 battery which is 540 mAh. So I would guess around 400 miles based on what others are reporting.

krzysiekmz
Posts: 1082
Joined: Sat Nov 10, 2007 4:23 am
Location: Poland/Toronto
Contact:

by krzysiekmz

Hi,

great tips to modify the battery pack. Will definetly use some when I decide to go ahead with Di2 setup.

Question:

If I only want to run rear derr. for now, do I need both front+rear harness?

I know I need the adjustment buttons for initial tuning, but could I remove the box afterwards and connect a satelite shifter straight to rear harness-battery-rear derr.?

It would save weight, reduce the amount of cables and possibly some $ since a shop could do the adjustment for me :thumbup:

Any ideas?
Orbea Oiz - xxxx
MSC Koncept Carbon Di2 - 6955g
Leichtkraft Team Carbon - 6868g.

timtri13
Posts: 34
Joined: Wed Oct 05, 2011 4:57 pm

by timtri13

hello

someone can help me please I will put a Di2 TT on my non compatible shiv so I want to put a li-po battery but someone can say me if this specification are ok for the Di2 ???

Accu FlightPower EONxLite
25c 2S 800maH
Capacite 800
Tension 7.4V
25C en decharge

king regards timtri13

Permon
Posts: 640
Joined: Mon Jun 23, 2008 8:52 am

by Permon

rustychain wrote:No offence intended but we already have a very efficiant way to transfer human energy to power both the "instructions" and the actual shifting. It's called a cable. Really guys. How complicated do you want to get. Remember K.I.S.S :beerchug:


:up:

timtri13
Posts: 34
Joined: Wed Oct 05, 2011 4:57 pm

by timtri13

timtri13 wrote:hello

someone can help me please I will put a Di2 TT on my non compatible shiv so I want to put a li-po battery but someone can say me if this specification are ok for the Di2 ???

Accu FlightPower EONxLite
25c 2S 800maH
Capacite 800
Tension 7.4V
25C en decharge

king regards timtri13


ok so I answer me :mrgreen: :mrgreen: :mrgreen: after a night to search all the information for cistom my Di2 I can help the guys who are in the same situation of me :wink: :wink:

so for find a compatible stick it's simple you have to find a li-po accu with

7.4V obligatory
minus (for a confortable use) 550 mah
maximum as you want (but more mah want to say more of weight and more size ) generaly i saw 800 or 1200 mah
and for the last indacation the C you have to take
minus: 20C and more is better you can find 25 or 30C

so I have buy this mornig the one with

7.4V
800 mah
20C


Image

high of 7.5 centimeter just the size of the nosecone for my shiv there isn't better ;-)

bye

albike
Posts: 32
Joined: Thu May 17, 2007 12:50 pm
Location: Denmark

by albike

I run Ultegra Di2 which have 2 wires and not 4 like Dura Ace. Will it then be enough with only one battery?

chpfly
Posts: 42
Joined: Wed Nov 29, 2006 12:24 am

by chpfly

I am running Ultegra i2 - I want to put the Battery in the seatpost. Would this work?

Battery: thinking this one - http://www.batteryspace.com/customizedp ... thpcb.aspx

What about using USB connections? easy to charge. The Ui2 is 2 wire. Just splice the battery cable into the usb and the battery to the other usb and plug and play?

USB Male - http://www.batteryspace.com/connectorad ... ordiy.aspx

USB Female - http://www.batteryspace.com/connectorad ... ordiy.aspx

xnavalav8r
Posts: 2643
Joined: Mon Jan 21, 2008 12:09 pm

by xnavalav8r

Try the internal Battery from Icarus as seen on my bike here: http://www.bikerumor.com/2011/11/10/sic ... sh-cycles/" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;

Lighter than the stock battery and 50% more endurance.

here is the link to Icarus. http://icaruslights.com/batteries/" onclick="window.open(this.href);return false;

albike
Posts: 32
Joined: Thu May 17, 2007 12:50 pm
Location: Denmark

by albike

No one who can help if the case is a Ultegra Di2 system?

krzysiekmz
Posts: 1082
Joined: Sat Nov 10, 2007 4:23 am
Location: Poland/Toronto
Contact:

by krzysiekmz

I am currently using cateye buttons for my front derr. with great success.

However, I have been looking for a single switch that could operate the derr. both up and down.

Is anyone using something like this?

Chris.
Orbea Oiz - xxxx
MSC Koncept Carbon Di2 - 6955g
Leichtkraft Team Carbon - 6868g.

by Weenie


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