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 Post subject: Re: Ultegra Di2 discs.
PostPosted: Mon Mar 24, 2014 11:16 am 
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Joined: Wed Jun 08, 2011 11:26 am
Posts: 14
Rear shifting is awesome...no cable stretch yet! :wink:


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 Post subject: Re: Ultegra Di2 discs.
Posted: Mon Mar 24, 2014 11:16 am 


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 Post subject: Re: Ultegra Di2 discs.
PostPosted: Thu Mar 27, 2014 6:29 am 
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Joined: Thu Sep 23, 2010 1:44 pm
Posts: 53
I have just built up a new Cannondale SuperX using the R785 levers but mated to the latest XTR M987 XC calipers as they are lighter. I run single ring on the CX bike using the Cannondale Si chainset and a stages PM arm so I have setup the shifting so that both buttons on the RH lever go down the cassette and both buttons on the LH lever go up the cassette. I find this to be very useful with freezing hands you are sure to hit one of the buttons to make the shift!!

With this build I have also routed the cables internally and used the internal mounted battery in the seat tube.

I can't wait to race this bike come September - the Di2 and hydraulic braking combination is just superb

Stephen James

Renvale RT/Reveloutdoors.co.uk/Cannondale


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 Post subject: Re: Ultegra Di2 discs.
PostPosted: Thu Mar 27, 2014 8:18 am 
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Joined: Mon Dec 09, 2013 3:19 pm
Posts: 35
What frame was it?

Black/grey/red?


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 Post subject: Re: Ultegra Di2 discs.
PostPosted: Thu Mar 27, 2014 10:03 am 
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Joined: Mon Dec 09, 2013 3:19 pm
Posts: 35
And where were you able to buy a superx frame?

Did you buy a complete bike?


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 Post subject: Re: Ultegra Di2 discs.
PostPosted: Thu Mar 27, 2014 12:18 pm 
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Joined: Thu Sep 23, 2010 1:44 pm
Posts: 53
It is the normal Cannondale Green/Blacl/White colours, and yes I did have to buy a complete bike but the SRAM disc model can be found for reasonable money. I found one in the USA for $3500 and imported to the UK then sold most of the spare parts!


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 Post subject: Re: Ultegra Di2 discs.
PostPosted: Thu Mar 27, 2014 12:19 pm 
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Joined: Mon Dec 09, 2013 3:19 pm
Posts: 35
The model from 2013?

Is it "di2-ready"?


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 Post subject: Re: Ultegra Di2 discs.
PostPosted: Thu Mar 27, 2014 12:42 pm 
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Joined: Thu Sep 23, 2010 1:44 pm
Posts: 53
No it is not Di2 ready but it is quite easy to make a neat job.

I have drilled a hole for the grommet in the down tube then routed the wire inside to the BB. The internal battery sits inside the seatpost and the wire from that also drops down to the BB area. The only part i did not route internally was for the rear mech. For this I drilled a hole in the bottom of the BB shell and took the wire directly out through another grommet and used the shimano cable cover to run the cable on the under-side of the chainstay.

Then for your wires around the BB, I find it is best to use superglue to bond them around the outside of the inner BB shell to keep them away from the BB spindle. I mounted the internal junction box right at the bottom of the down tube near the BB shell.

For me it was quite an easy install although of course make great care with drilling the holes. I own a company that manufactures the wiring harnesses for F1 teams such as Mercedes, RBR, Lotus etc so wiring is second nature!!


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 Post subject: Re: Ultegra Di2 discs.
PostPosted: Thu Mar 27, 2014 12:45 pm 
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Joined: Mon Dec 09, 2013 3:19 pm
Posts: 35
Ok

Thanks for sharing.

I don't know if i'm willing to drill a carbon frame though.

If possible, please post i picture. It sounds like an awesome bike!


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 Post subject: Re: Ultegra Di2 discs.
PostPosted: Thu Mar 27, 2014 1:13 pm 
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Joined: Thu Sep 23, 2010 1:44 pm
Posts: 53
Really dont be afraid to drill the frame - a well placed hole never caused any issues! Just make sure you use new drill bits and step up to the 6mm in increments. Also use masking tape on the frame where you are going to drill.

Some pictures

Image
Image
Image
Image
Image
Image
Image
Image

https://www.flickr.com/photos/85831261@N04/13445450024/in/photostream/


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 Post subject: Re: Ultegra Di2 discs.
PostPosted: Thu Mar 27, 2014 1:43 pm 
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Joined: Mon Dec 09, 2013 3:19 pm
Posts: 35
Lookong good!

Have you finished building the bike?

If so, what does it weigh?


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 Post subject: Re: Ultegra Di2 discs.
PostPosted: Thu Mar 27, 2014 9:27 pm 
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Joined: Thu Sep 23, 2010 1:44 pm
Posts: 53
7.14 kg with the SRAM Elsa PM chainset, setup single ring. Pretty happy with that, and that is with the 38mm carbon tubs + FMB's as in the pic


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 Post subject: Re: Ultegra Di2 discs.
PostPosted: Fri Apr 25, 2014 7:18 pm 
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Joined: Fri Apr 25, 2014 6:49 pm
Posts: 10
I'm building one at the moment, having fun with the Di2 and the R785's at the moment.


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 Post subject: Re: Ultegra Di2 discs.
PostPosted: Fri Apr 25, 2014 7:22 pm 
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Joined: Fri Apr 25, 2014 6:49 pm
Posts: 10
The holes for the grommets are only small 7mm diameter. Just be careful drilling and use the shimano grommets.


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 Post subject: Re: Ultegra Di2 discs.
PostPosted: Fri Apr 25, 2014 7:24 pm 
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Joined: Fri Apr 25, 2014 6:49 pm
Posts: 10
stephenjames wrote:
No it is not Di2 ready but it is quite easy to make a neat job.

I have drilled a hole for the grommet in the down tube then routed the wire inside to the BB. The internal battery sits inside the seatpost and the wire from that also drops down to the BB area. The only part i did not route internally was for the rear mech. For this I drilled a hole in the bottom of the BB shell and took the wire directly out through another grommet and used the shimano cable cover to run the cable on the under-side of the chainstay.

Then for your wires around the BB, I find it is best to use superglue to bond them around the outside of the inner BB shell to keep them away from the BB spindle. I mounted the internal junction box right at the bottom of the down tube near the BB shell.

For me it was quite an easy install although of course make great care with drilling the holes. I own a company that manufactures the wiring harnesses for F1 teams such as Mercedes, RBR, Lotus etc so wiring is second nature!!


That's a good tip with the superglue, I was going to use tape.


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 Post subject: Re: Ultegra Di2 discs.
Posted: Fri Apr 25, 2014 7:24 pm 


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 Post subject: Re: Ultegra Di2 discs.
PostPosted: Fri Apr 25, 2014 7:26 pm 
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Joined: Fri Apr 25, 2014 6:49 pm
Posts: 10
stephenjames wrote:
I have just built up a new Cannondale SuperX using the R785 levers but mated to the latest XTR M987 XC calipers as they are lighter. I run single ring on the CX bike using the Cannondale Si chainset and a stages PM arm so I have setup the shifting so that both buttons on the RH lever go down the cassette and both buttons on the LH lever go up the cassette. I find this to be very useful with freezing hands you are sure to hit one of the buttons to make the shift!!

With this build I have also routed the cables internally and used the internal mounted battery in the seat tube.

I can't wait to race this bike come September - the Di2 and hydraulic braking combination is just superb

Stephen James

Renvale RT/Reveloutdoors.co.uk/Cannondale


That's a good idea with the shifters and shows the versatility of the Di2.


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