SRAM's new 2023 Drivetrain allows full power shifts

G-Sport

New Member
Oct 7, 2022
120
87
Yorkshire
So did they MOVE the cassette out 2.5mm or is the big gear in the same place and it is 2.5mm wider? If so pitch is going to be bigger and cable derailleurs are going to need a pull modifier to work.
 

Zimmerframe

MUPPET
Subscriber
Jun 12, 2019
12,617
18,360
Brittany, France
So did they MOVE the cassette out 2.5mm or is the big gear in the same place and it is 2.5mm wider? If so pitch is going to be bigger and cable derailleurs are going to need a pull modifier to work.
Pitch is the same. It's all just 2.5mm further out. You can use an existing derailleur with the cassette if you space out 2/3mm.
 

G-Sport

New Member
Oct 7, 2022
120
87
Yorkshire
Pitch is the same. It's all just 2.5mm further out. You can use an existing derailleur with the cassette if you space out 2/3mm.
Thanks. So presumably there is more spoke clearance, so if/when the chain finds it's way between the cassette and the spokes it is going to get even more jammed?
Does anyone know WHY they have done this? If they had left it where it was then the UDH "standard" might not be on revision H and compatibility of everything would be better?!?!
 

pontoon

New Member
Apr 24, 2023
43
14
USA
For anyone who has a gen3 levo and the 36t chain ring:
- Did you keep the chain guide?
- If you got rid of the chain guide, are you getting dropped chains?
- if anyone by chance is using the cascade long link with the bottom bracket in the low position, how many links did you use? The online calculator is telling me to use 120 links
 

AlumiPro

New Member
May 1, 2023
5
1
California
For anyone who has a gen3 levo and the 36t chain ring:
- Did you keep the chain guide?
- If you got rid of the chain guide, are you getting dropped chains?
- if anyone by chance is using the cascade long link with the bottom bracket in the low position, how many links did you use? The online calculator is telling me to use 120 links
I ran a 36t SRAM X-Sync 2 aluminum chainring on my gen3 with AXS XX1 and the factory chain guide with no issues. The chain guide is slotted so it can be slid up to clear the 36t and chain just fine. I had to remove some of the stacked washers/spacers behind the chain guide because the Sram aluminum 36t is a little bit different offset than the SRAM 34t steel chainring. Removing some of those washers/spacers allowed the chain guide to move inward toward the frame so the inside of the chain wasn’t rubbing it.
I am now running the new SRAM XX T-type on my gen3 with the t-type 36t chainring with now issues. The t-type 36t chainring is steel which has a different offset than the aluminum 36t SRAM chainring I was running before, so I found that I had to add the washer/spacers back again (same as it was with the factory SRAM 34t). It’s running great!
I’m in the HI setting with the Cascade Long Link and have always run 118 links.
 

AlumiPro

New Member
May 1, 2023
5
1
California
For anyone who has a gen3 levo and the 36t chain ring:
- Did you keep the chain guide?
- If you got rid of the chain guide, are you getting dropped chains?
- if anyone by chance is using the cascade long link with the bottom bracket in the low position, how many links did you use? The online calculator is telling me to use 120 links

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Last edited:

Rich-H

New Member
Apr 3, 2023
65
48
Hampshire
What?
There is no "end cap" on an XD driver? And if there was it would rotate with the cassette so how could it be "against the derailleur body"?
Do you mean that the hub axle collar is against the part of the derailleur that acts as the dropout (and replaces the UDH)?
That makes sense but the effective OLD would still need to be the same, and there would (presumably) still be a 3mm deep channel in this part to act as the location for the axle end-cap when installing the wheel.
So either the chain has to overhang the locating channel or the channel depth is reduced significantly. Either of which would need to be in the original UDH frame mating specifications to make sure the chain won't rub the stays but isn't.
 

G-Sport

New Member
Oct 7, 2022
120
87
Yorkshire
Thanks for posting that.
Still don't understand why they moved the cassette out 2.5mm, the 13 speed theory is the only logical explanation I've heard but surely no-one really wants that? Maybe for XC I suppose to have closer gaps, but if they are doing the 2, 4, 6 and 8 tooth jumps so they can do narrow-wide then they aren't going to be able to tighten the ratios up so they would just be looking at doing a 60 tooth (or 62 even) big ring which I can't see anyone wanting.
 

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