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Anyone using a SRAM 11-36T cassette with a Di2 setup?

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Anyone using a SRAM 11-36T cassette with a Di2 setup?

Old 05-20-17, 04:18 PM
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Anyone using a SRAM 11-36T cassette with a Di2 setup?

I am thinking of trying this, based on some reports that it could work with the B-screw cranked down.

I have a Di2 Ultegra 11-speed system with the longer cage and am currently running a 11-32T cassette.

Is anyone doing this successfully here? Any suggestions to keep it working smooth? Would it work with a Shimano 11-speed chain, or would I need to use an SRAM 11-speed chain?
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Old 05-20-17, 04:54 PM
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You should check here

http://www.bikeforums.net/general-cy...vs-triple.html
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Old 05-20-17, 05:18 PM
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Originally Posted by tagaproject6 View Post
You should check here
No mention of it there, but I really appreciate your help. Thanks.
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Old 05-20-17, 07:29 PM
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@TimothyH

Are you doing this? What chain do you use?
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Old 05-20-17, 08:39 PM
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I am running exactly what is described.

  • SRAM PG-1170 (Force) 11-36 cassette
  • Shimano Ultegra 6870 Di2 GS mid-cage derailleur
  • Shimano Ultegra 50/34 compact road cranks
  • Shimano Ultegra chain.

Bike is a Niner RLT 9 RDO. It shifts fine. I cross chain the crud out of it, shift under load, basically beat the heck out of it. No problem whatsoever.

The B screw had to be turned in (clockwise) quite a bit but the pulley clears clears large sprocket fine. I don't like the angle of the B screw against the derailleur hanger but this might be an issue specific to the shape of the hanger which comes with the Niner. If it becomes a problem then I'll get some kind of derailleur hanger extender, Wolf Tooth or similar. This is a picture of the screw before it was cranked in clockwise. The angle is much more acute now.



Four links were removed from the stock Ultegra chain and a KMC Missing Link was added. The KMC part number for 11 speed is CL-555.

This is how it looks crosschained small front (34) and small rear (11)...



This is how it looks crosschained big front (50) and big rear (36)...



If the sprocket were any larger than 36 it would definitely need derailleur hanger extender. I was prepared to need a Wolf Tooth RoadLink extender but did not need to do so. If the B screw becomes an issue in the future then I won't hesitate.


-Tim-

Last edited by TimothyH; 05-20-17 at 08:51 PM.
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Old 05-21-17, 05:59 AM
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I've seen tandems set up with Di2 using this:

https://www.wolftoothcomponents.com/products/roadlink
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Old 05-21-17, 07:57 AM
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Originally Posted by TimothyH View Post
I am running exactly what is described....
Thanks very much for the detailed post. I really appreciate it (and am about to try to replicate it).
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Old 05-21-17, 07:59 AM
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Originally Posted by Trsnrtr View Post
I've seen tandems set up with Di2 using this:

https://www.wolftoothcomponents.com/products/roadlink
If for some reason the B-screw trick isn't enough, I will definitely go for that. Thanks!
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Old 05-26-17, 04:58 PM
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OK, looks like it works, at least on the stand. If the weather is decent tomorrow, I will test it in the field. Briefly, I have the 11-36T cassette set up with a new Shimano chain (which I waxed) and my 46/30T crankset. That gives me a 22.6 "gear inch" low (as opposed to a 29" low gear I started with when I had a 50/34 vs. 11-32), and I can safely cross-chain (not that I plan to) with two links removed from the new chain. The shifting seems rougher, but that could be the hot paraffin lube I decided to try...
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Old 11-15-18, 01:37 PM
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Originally Posted by wgscott View Post
OK, looks like it works, at least on the stand. If the weather is decent tomorrow, I will test it in the field. Briefly, I have the 11-36T cassette set up with a new Shimano chain (which I waxed) and my 46/30T crankset. That gives me a 22.6 "gear inch" low (as opposed to a 29" low gear I started with when I had a 50/34 vs. 11-32), and I can safely cross-chain (not that I plan to) with two links removed from the new chain. The shifting seems rougher, but that could be the hot paraffin lube I decided to try...
It's been a year. How is it working? Getting ready to go Di2 on my bikes.
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Old 11-15-18, 03:32 PM
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It works fine. I also use Shimano's 11-34T eleven-speed cassette on another wheel-set. Both work without issue. I don't know why I wrote that the shifting seems rougher. It is fine.
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Old 11-15-18, 03:46 PM
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https://glorycycles.com/shimano-ulte...izer-rd-rx805/
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