Numbskull here needs help with Di2 Road and XTR cassette.

Especially for light weight issues concerning cyclocross / touring bikes & parts.

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simplemind
Posts: 39
Joined: Mon May 04, 2015 11:06 pm

by simplemind

Ignorance is bliss...right? Well, not exactly. I have an XTR wheelset that I want to use with my 11 sp Ultegra Di2 gravel bike. I didn't realize that I couldn't use a road cassette on an XTR freewheel (I know now). So I'm stuck with this brand new XTR wheelset, and a bike with new Ultegra Di2 mech's.
Is there any hope, and/or what alternatives do I have?

wingguy
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by wingguy

You could use the new 'Ultegra' HG800 11-34 cassette, as the 34t hangs to the inside like 11sp XT/XTR cassettes do.

If you want smaller than that you could use an Edco 11-28 conversion cassette or similar.

by Weenie


simplemind
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Joined: Mon May 04, 2015 11:06 pm

by simplemind

That's a decent alternative, thanks! Running 11-36 SRAM road cassette now on my other wheelset.

simplemind
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Joined: Mon May 04, 2015 11:06 pm

by simplemind

wingguy wrote:
Wed Mar 14, 2018 6:24 pm
You could use the new 'Ultegra' HG800 11-34 cassette, as the 34t hangs to the inside like 11sp XT/XTR cassettes do.
Another question...will the shifting be effected (Di2), using this cassette?

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ms6073
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by ms6073

Shouldn't after you re-adjust the rear derailleur for the change in cassette spacing.
Michael - The Anaerobic Threshold is neither...

wingguy
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by wingguy

simplemind wrote:
Wed Mar 14, 2018 7:22 pm
Another question...will the shifting be effected (Di2), using this cassette?
The HG800 is specifically designed to be used with Ultegra R8000 and R8050 long cage mechs.

simplemind
Posts: 39
Joined: Mon May 04, 2015 11:06 pm

by simplemind

wingguy wrote:
Wed Mar 14, 2018 8:06 pm
simplemind wrote:
Wed Mar 14, 2018 7:22 pm
Another question...will the shifting be effected (Di2), using this cassette?
The HG800 is specifically designed to be used with Ultegra R8000 and R8050 long cage mechs.
:thumbup: Gracias!

simplemind
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Joined: Mon May 04, 2015 11:06 pm

by simplemind

Have another question...would I have an issue just using an XT/XTR 11-40 cassette with my 6800 GS mech?

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IrrelevantD
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by IrrelevantD

simplemind wrote:
Thu Mar 15, 2018 3:08 am
Have another question...would I have an issue just using an XT/XTR 11-40 cassette with my 6800 GS mech?
I have a 6800-GS on my Crockett. 11-32 is a tight fit, you might get a 34 to work, but I can’t see a 40t fitting.
* There is a 70% chance that what you have just read has a peppering of cynicism or sarcasm and generally should not be taken seriously.
I'll leave it up to you to figure out the other 30%. If you are in any way offended, that's on you.

simplemind
Posts: 39
Joined: Mon May 04, 2015 11:06 pm

by simplemind

IrrelevantD wrote:
Tue Mar 20, 2018 12:54 am
simplemind wrote:
Thu Mar 15, 2018 3:08 am
Have another question...would I have an issue just using an XT/XTR 11-40 cassette with my 6800 GS mech?
I have a 6800-GS on my Crockett. 11-32 is a tight fit, you might get a 34 to work, but I can’t see a 40t fitting.
I have no problem with the SRAM 11-36, and it "appears" like the arm is long enough to accomodate a larger cassette. Just hoping someone who has done this will speak up.

Thanks!

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ms6073
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by ms6073

Souds like the kind of issue the Wolftooth derailleur links are designed to address.
Michael - The Anaerobic Threshold is neither...

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IrrelevantD
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by IrrelevantD

simplemind wrote:
Tue Mar 20, 2018 2:40 am

I have no problem with the SRAM 11-36, and it "appears" like the arm is long enough to accomodate a larger cassette. Just hoping someone who has done this will speak up.

Thanks!
Could be your bike has a slightly longer deraileur hangar, I just know that 32 is tight on mine and I think 34 would hit the top pully regardless of any b-screw adjustment. I'd also say that unless you're running rings really close to each other in size up front, you might run into an issue with how much slack a 6800 will take up. Officially the total capacity on the 6800 is 37t, with an 11-40 that's 29t right there. Doesn't leave you a lot of options in front unless you're running 1x. Not saying it can't be done... just not to be surprised if it doesn't. Wolftooth link mentioned by @ms6073 probably your best bet as it's going to effectively lenthen your hangar, but not sure if that gives you any extra capacity when it comes to the rings.
* There is a 70% chance that what you have just read has a peppering of cynicism or sarcasm and generally should not be taken seriously.
I'll leave it up to you to figure out the other 30%. If you are in any way offended, that's on you.

simplemind
Posts: 39
Joined: Mon May 04, 2015 11:06 pm

by simplemind

ms6073 wrote:
Tue Mar 20, 2018 3:55 am
Souds like the kind of issue the Wolftooth derailleur links are designed to address.
Yes, however I thought a Road Link might mess with the shifting when I use my other wheelset, which is 11-32. That's the only reason not to use a Road Link as far as I know.
Here in an interesting video describing the use of a 42t mtb cassette w/ a Shimano 105 https://www.youtube.com/watch?v=Qbg-UgQ5Pnk

TheKaiser
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by TheKaiser

Here is a review of the "Ultegra" 11-34t cassette. The comments also have quite a bit of discussion regarding going bigger than that and what mods are/are not required: https://cyclingtips.com/2018/03/shimano ... te-review/

simplemind
Posts: 39
Joined: Mon May 04, 2015 11:06 pm

by simplemind

TheKaiser wrote:
Sat Mar 24, 2018 5:13 pm
Here is a review of the "Ultegra" 11-34t cassette. The comments also have quite a bit of discussion regarding going bigger than that and what mods are/are not required: https://cyclingtips.com/2018/03/shimano ... te-review/
Thanks, a good write up. I've got it (HG800) on the bike now, just need some time on it to give a proper eval.

by Weenie


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