Mounting SRAM XPLR cassette- HELP!

4 replies · 160 views

Gravel Scott
12 posts
#1Mar 2, 2025, 7:55 AM
I am trying to mount a 12 spd XPLR cassette to a Roval Terra C wheel. I have the correct XDR driver body on the hub. I can set the cassette onto the driver and the cassette easily threads onto the body. But when the cassette is fully seated, I notice that the driver begins to spin and I am not able to tighten the lock ring to 40 nM. The cassette has zero wobble and is fully seated, but it will not tighten any further.

Is this normal? As I said- the cassette is fully seated (no cross threading), but I can see the driver begins to spin once the cassette is fully set and I cannot get a "click" from my torque wrench.

Any help would be appreciated. Thanks.
0
Froze
16 posts
#2Mar 3, 2025, 11:01 AM
Here is website that might help:

Why Is Your Cassette Lockring Not Tightening?- 6 Solutions

This is from SRAM, scan down to about a third of the way down to where it says "Cassette Installation":

https://turncranks.com/cassette-lockring-not-tightening/
0
Gravel Scott
12 posts
#3Mar 3, 2025, 3:01 PM
Here is website that might help:

Why Is Your Cassette Lockring Not Tightening?- 6 Solutions

This is from SRAM, scan down to about a third of the way down to where it says "Cassette Installation":

https://turncranks.com/cassette-lockring-not-tightening/
Thanks, but the cassette is fully seated and there is no play in the cassette. However, once fully seated, the driver starts to spin and I can't get the nut tightened to 40 nM. I have always had Shimano components, so I am not familiar with SRAM. There is no "tighten to" number on the lock ring (which is part of the cassette), so I don't know it this is normal. I'm assuming it should tighten to 40 nM like a Shimano cassette.
0
Froze
16 posts
#4Mar 3, 2025, 4:01 PMedited
Ok, then it sounds like you need spacer because you're bottoming out, the question is how much of one, but as a guess 1mm should be all that you would need. I would think a bike shop would be able to tell you how much of a spacer you need. Sometimes they need a 2mm spacer, but I would start with 1 before going to 2.

Let me know if this makes sense to you.
0
Gravel Scott
12 posts
#5Mar 4, 2025, 5:33 AM
Ok, then it sounds like you need spacer because you're bottoming out, the question is how much of one, but as a guess 1mm should be all that you would need. I would think a bike shop would be able to tell you how much of a spacer you need. Sometimes they need a 2mm spacer, but I would start with 1 before going to 2.

Let me know if this makes sense to you.
Thanks- yes that makes sense.

I don't know if this is pertinent, but I have a DT Swiss 370 hub (the newer one with the modified star rachet). It came with a Shimano driver, but I purchased the correct XDR driver for the hub. I will try the spacer and see if that allows me to torque down the lock nut.
0

Related threads

ICAN GRA02 Gravel Bike FrameBikes · 10 replies · Sep 13, 2018
1X or 2X that is the question.Bikes · 54 replies · May 11, 2018
Need help with choosing the right bike.Bikes · 7 replies · Nov 21, 2016
Chinese Carbon Gravel Build - CarbondaBikes · 6,034 replies · Mar 30, 2025
Kona Private Jake SSCX build....Bikes · 20 replies · Aug 23, 2018