Go Back  Bike Forums > Bike Forums > Cyclocross and Gravelbiking (Recreational)
Reload this Page >

Anyone running 11spd di2 with XT/XTR rear derailleur?

Notices
Cyclocross and Gravelbiking (Recreational) This has to be the most physically intense sport ever invented. It's high speed bicycle racing on a short off road course or riding the off pavement rides on gravel like : "Unbound Gravel". We also have a dedicated Racing forum for the Cyclocross Hard Core Racers.

Anyone running 11spd di2 with XT/XTR rear derailleur?

Old 03-05-21, 06:59 AM
  #1  
Senior Member
Thread Starter
 
Join Date: Oct 2013
Location: Apopka, Florida
Posts: 1,476

Bikes: Santa Cruz Stigmata

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 202 Post(s)
Liked 30 Times in 20 Posts
Anyone running 11spd di2 with XT/XTR rear derailleur?

The time has come for me to decide which rear derailleur I'm going to use on my gravel bike and I can choose between XT, XTR, GRX 817, or GRX 815. So far I have a Sram XX1 cassette and a set of Ultegra di2 shifters. There seems to be some confusion with the rear derailleurs and their capacities and hoped that there were some actual users out there that could chime in on their experiences using any of the four I mentioned on a 1x setup.

So far my research hasn't come up with any solid answers about each derailleurs performance as a 1x along with a 42+ cog on the rear. Some say the XT and XTR derailleurs don't shift well and are slow compared to the road components but almost all have attributed that slowness to the syncro-shift feature where the front and rear derailleurs work together for optimal gearing. (seems less than optimal)

The GRX di2 derailleurs are also confusing where the 817 designed for 1x has a shorter cage than the 815 designed for 2x, wtf? The 817 is based of the XT mountain derailleur with a larger motor and clutch assembly where the 815 is based off the road derailleurs.

At the end of the day I want a 1x derailleur that will shift as well as my old road bike with Ultegra di2 but work with a 10-42 cassette. Which would you choose and why? Right now I'm leaning towards the XTR due to price because its $50 less than the GRX817 and also weighs a bit less too.

Thanks.

Last edited by dvdslw; 03-05-21 at 07:12 AM.
dvdslw is offline  
Old 03-05-21, 08:28 AM
  #2  
Blazer of saddles, trails
 
Join Date: Dec 2016
Location: Inside the Beltway
Posts: 209
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 115 Post(s)
Liked 33 Times in 25 Posts
I ran 11-speed Di2 XTR RD for about two years with a e*13 9-46 cassette. Worked a charm. Didnít notice it being any slower than my 6800 Di2 road bike. Eventually switched over to the AXS mullet, but that wasnít due to any dissatisfaction with the Shimano set up.
blazin is offline  
Likes For blazin:
Old 03-05-21, 03:39 PM
  #3  
Senior Member
 
shoota's Avatar
 
Join Date: Jun 2012
Location: Stillwater, OK
Posts: 7,829
Mentioned: 33 Post(s)
Tagged: 0 Thread(s)
Quoted: 1873 Post(s)
Liked 693 Times in 469 Posts
I'd go for the cheapest of the XT, XTR, and GRX RDs. Plenty of people using them with 11-42 cassettes around here on their gravel bikes.
__________________
2014 Cannondale SuperSix EVO 2
2019 Salsa Warbird
shoota is online now  
Likes For shoota:
Old 03-05-21, 03:53 PM
  #4  
I am potato.
 
base2's Avatar
 
Join Date: Jun 2015
Location: Pacific Northwest
Posts: 3,162

Bikes: Only precision built, custom high performance elitist machines of the highest caliber. 🍆

Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 1810 Post(s)
Liked 1,678 Times in 961 Posts
In my experience working on a friends bike, the GRX di2 would not accomodate the 16 tooth jump in front chainrings. A 10 tooth jump was the limit & it was enforced by physical design stops.

Intentionally crippling the derailleur for reduced range to wedge in a product niche never sat well with me.

In the end, I stuck the di2 road derailleur back on with a new 11-42 cassette & told her junction box to avoid the big/big combination. (Even though the derailleur handled big/big fine, I just thought it best to avoid anyways.)

I really don't "get" GRX it seems so much like a solution looking for a problem.

XT/XTR would be where I'd look if I were looking for something new. Else, I'd first see how the road derailleur you have does on the workstand.
base2 is online now  
Old 03-05-21, 07:21 PM
  #5  
Junior Member
 
Join Date: May 2017
Location: California
Posts: 10

Bikes: 2020 Julianna Quincy

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
I have a spare XT di2 I used to use in a 1x set up. If you want it you can have it. DM me.
nagakuraruan is offline  
Likes For nagakuraruan:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.