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Shimano Electronic - Considering DI2

Posted: Mon Jun 10, 2013 6:54 am
by photocycler
Considering going from SRAM to Shimano electronic. Some questions and concerns below I have

1. Does anyone run a mix of DA and Ultegra? I hate the look of the Ultegra cranks and would also prefer the DA brakes

2. I currently run a 12-30 cassette. Currently shimano Electronics go up to a 28t cassette. Concerned it could be difficult in the hills

Shimano Electronic - Considering DI2

Posted: Mon Jun 10, 2013 6:54 am
by Weenie

Re: Shimano Electronic - Considering DI2

Posted: Mon Jun 10, 2013 7:36 am
by coppercook62
Buddy runs all Ultegra di2 with 7900 cranks and brakes

Re: Shimano Electronic - Considering DI2

Posted: Mon Jun 10, 2013 9:53 am
by dha
Ultegra di2 goes up to 28 yes.

Re: Shimano Electronic - Considering DI2

Posted: Mon Jun 10, 2013 9:56 am
by MisterNoChain
I have put a 30 on an Ultegra DI2, no problems at all.

Re: Shimano Electronic - Considering DI2

Posted: Mon Jun 10, 2013 12:09 pm
by dha
Had heard it goes to 30, but not seen it in use. I assume it's 11-30 with a compact up front?

Re: Shimano Electronic - Considering DI2

Posted: Mon Jun 10, 2013 12:18 pm
by Devon
What chainrings do you use? I assume if you are getting Di2 you race? You have no need for more than 25 (in my eyes) for racing. I use a 12-22 with 39-53 for all my training/racing/commuting however could see the benefit of up to 25. I highly doubt you'd need to go up to a 30.

There are no reasons Ultegra and DA shouldn't mix that I know of.

Re: Shimano Electronic - Considering DI2

Posted: Mon Jun 10, 2013 12:52 pm
by Stoo
Sorry to jump on the thread here, but I#m going to be building up a bike very soon and I'm looking for the best place to buy a Dura Ace Di2 Groupset (10spd)

Internal wiring with Di2 mount battery.
Struggling.
Any suggestions people?

Re: Shimano Electronic - Considering DI2

Posted: Mon Jun 10, 2013 1:42 pm
by TrekUk
DA9000 Di2 is what you want if your going to do it right.

Re: Shimano Electronic - Considering DI2

Posted: Mon Jun 10, 2013 1:44 pm
by Geoff
The chainring spacing is the same for both groups.

Re: Shimano Electronic - Considering DI2

Posted: Mon Jun 10, 2013 2:57 pm
by MisterNoChain
dha wrote:Had heard it goes to 30, but not seen it in use. I assume it's 11-30 with a compact up front?

Yes, with a compact it was.

Re: Shimano Electronic - Considering DI2

Posted: Wed Jun 12, 2013 4:01 pm
by boots2000
I have a buddy that got the KI2 rear derailleur conversion from K-edge.
He runs an 11-32 and sometimes an 11-36 with his DI2.
I would suggest this if you want DI2 and low gears.
He runs a 50/34 up front. He is strong too- just likes low gears and also
likes to keep it in big ring in races.

Re: Shimano Electronic - Considering DI2

Posted: Wed Jun 12, 2013 4:01 pm
by Weenie

Re: Shimano Electronic - Considering DI2

Posted: Wed Jun 12, 2013 9:14 pm
by eliflap-scalpel
with 10T pulleys you can run a 30T cog ...

without expensive K-Edge cage