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PostPosted: Tue Feb 05, 2013 4:43 am 
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Joined: Tue Feb 05, 2013 4:22 am
Posts: 5
I have some very hilly riding coming up and was wondering if the 12-30t cassette will work with Ultegra Di2? I think I read somewhere that the maximum was 28 teeth but is that Shimano being conservative?

Thanks


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PostPosted: Tue Feb 05, 2013 5:48 am 
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Joined: Wed Jun 25, 2008 6:08 am
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I've used the Ultegra Di2 rear derailleur with a 12-32 before, with zero issues...


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Posted: Tue Feb 05, 2013 5:48 am 


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PostPosted: Tue Feb 05, 2013 7:29 am 
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Joined: Mon Oct 13, 2008 11:20 am
Posts: 64
Location: Lausanne, Switzerland
I've also setup Ultegra Di2 with an 11-32 cassette without an issue. It depends on the precise geometry of your dropout and the chain length, but with a 30-tooth cog it will probably work fine on most bikes, and on some you'll get away with a 32. Also remember that you can switch the inner ring on a compact for a 33-tooth (not available from Shimano, but is available from Stronglight or TA).


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PostPosted: Tue Feb 05, 2013 5:13 pm 
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Joined: Tue Feb 05, 2013 4:22 am
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Chris_W wrote:
I've also setup Ultegra Di2 with an 11-32 cassette without an issue. It depends on the precise geometry of your dropout and the chain length, but with a 30-tooth cog it will probably work fine on most bikes, and on some you'll get away with a 32. Also remember that you can switch the inner ring on a compact for a 33-tooth (not available from Shimano, but is available from Stronglight or TA).

Thanks for the replies. I have one of these:

http://www.bmc-racing.com/int-en/bikes/2012/road/model/roadracer/sl01/sl01_ultegra_di2.html

I noticed that the '13 plain Ultegra model has the 12-30t cassette:

http://www.bmc-racing.com/int-en/bikes/2013/road/model/roadracer/sl01/ultegra_.html

I don't believe the frames have changed from the '12 to '13 model. Presumably that will work then?


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PostPosted: Wed May 29, 2013 6:50 am 
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I have Di2 11-28 can you tell me what i need to do and components to get to convert it to 11-32 alternatively 11-30 if simple and less expensive.

thank you


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PostPosted: Wed May 29, 2013 10:04 am 
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Joined: Wed May 02, 2012 8:46 am
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I got Ultegra Di2 and had a 11-28 at first but switched to a 11-32 cassette with no problems.
No need to change any components, just adjust the B-screw and it'll work fine.


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Posted: Wed May 29, 2013 10:04 am 


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