Hey there! With the new sram transmission arriving I thought a thread for specialized bikes would be a good idea. Given that the only real variables are the frame, chainring size, and rear hub, it makes sense for people to talk about what micro-adjust setting they found to be optimal.
Micro adjust (1-14) Setting: 3

Are you trying to make a register for bike industry manufacturing tolerances?

The only hiccup I have encountered was in the stand. When shifting erratically (trying to cause something to mess up on purpose) from the 32T cog to the 38T cog I could occasionally get it to get out of sync.

What do you mean by "out of sync"?

Without any pedal pressure the chain just glides on top of the cog.

You mean the rollers don't fall into the valleys between the teeth?

While riding or under hard pedal pressure in the stand the chain skips forward within one pedal stroke and re-aligns with the narrow/wide positioning.

Chain skips forward and re-aligns with the narrow/wide positioning?

Could you post pictures of all this to clarify?


I guess Sram said, "Transmission" shifts better the more load applied. That could just mean they made shifting under little load worse 😂

 

Are you trying to make a register for bike industry manufacturing tolerances?


What do you mean by "out of sync"?


You mean the rollers don't fall into the valleys between the teeth?


Chain skips forward and re-aligns with the narrow/wide positioning?

Could you post pictures of all this to clarify?


I guess Sram said, "Transmission" shifts better the more load applied. That could just mean they made shifting under little load worse 😂

1. Not trying to make a register. Just curious what worked for other riders.
2. "out of sync" = narrow wide positioning is wrong
3. Yes, rollers don't fall into the valleys
4. Yes, chain skips forward and re-aligns with narrow/wide positioning
5. I will try and take some pictures for ya

 

Germany? Are they no longer headquartered in Chicago?

 

I’m not the one who made the comment about Germany, but I think SRAM’s drivetrain development program is based at their German site.

SRAM’s drivetrain roots go back to when they bought Sachs; was Sachs German? I bet they were.

 

Yes exactly. Sram shifting stuff is developed by former Sachs in Schweinfurt, Germany.

Sram is basically a big investment and management company that buys other companies specializing in certain bike parts.

They brag about German engineering in their video, that's why I made the reference to German arrogance.

 

I’m currently having mine looked at by a trusted bike mechanic. I’m not satisfied with the shifting from 32-38. It just isn’t reliable. It will randomly get out of sync while riding. I’m also getting some clicking and popping in a couple cogs while in trim position 3. I installed the group on another epic evo frame and got the same results. Poor shifting from 32 to 38. I’ll let you know what the mechanic and sram say about the shifting issue. Given that the cluster ends at the 32 tooth and the 38-44-52 are pinned together and to the cluster it may just be a bad cassette. That’s my hope atleast…

 

I’ll let you know what the mechanic and sram say about the shifting issue.

Yes please!

 

^^^
Too many accept that the LBS corrected the problem and never inquire for the details of the fix. That's just too lame. Please garner the details to share here.

 

100%. I was a bike mechanic in a previous life. There are only 2 other mechanics in the area I would trust with my bike. My problem is that I cannot get the level of support from sram that a bike shop can. The mechanic knows I will want to know the exact issue and how it was resolved.

 

To follow up on my post about derailleur issues…

The derailleur was warrantied. It was out of alignment from the factory and there was no fix. The new derailleur was installed (by me) and has been flawless. I am now at micro adjust setting 5 and everything is working as intended. The shop that warrantied the derailleur sent it back to sram and they were very interested in what caused the issue. We should hear back from them at some point.

I have since installed another transmission group (XO) level on a 2022 stumpjumper pro S3 frame. It is running perfectly in trim position 5 as well.

Sram did an incredible job with a quick warranty turn around on the derailleur and are eager to review the issue once they have it back.

 

To follow up on my post about derailleur issues…

The derailleur was warrantied. It was out of alignment from the factory and there was no fix. The new derailleur was installed (by me) and has been flawless. I am now at micro adjust setting 5 and everything is working as intended. The shop that warrantied the derailleur sent it back to sram and they were very interested in what caused the issue. We should hear back from them at some point.

I have since installed another transmission group (XO) level on a 2022 stumpjumper pro S3 frame. It is running perfectly in trim position 5 as well.

Sram did an incredible job with a quick warranty turnaround on the derailleur and are eager to review the issue once they have it back.

Sorry for the thread necro but i'm thinking about buying a previous-generation epic evo like yours in the sales and if I do, I would like to fit transmission as I love the way it shifts under load.

Is there any reason why only the new epic evo is listed on the compatibility website: Bike Finder | SRAM ?
Or is it just not well maintained and the previous gen epic evo is compatible as well?

 

Interesting. Thanks for the follow up. One thing that’s happened to me was that I think I sheared a shift ramp off my XX SL cassette on the 44t cog. Currently discussing possible warranty w the place I ordered the kit from (Tree Fort).

 

Interesting. Thanks for the follow up. One thing that’s happened to me was that I think I sheared a shift ramp off my XX SL cassette on the 44t cog. Currently discussing possible warranty w the place I ordered the kit from (Tree Fort).

Well, warranty won't really help. This is just how an alu sprocket will look like after a while when used with a chain made from steel. Harder material bites softer material. Even a $600 cassette cannot change that. Alu sprockets don't last long. Think of them a race parts but not suitable for everyday use.

 

Running Xx-SL on my '22 stumpjumper s-works s4 w/ eewings, one-up 0 offset switch DM 32t (disclaimer, likely, slightly increased chain wear). This is verified via caliper of closer to 56mm chain line, I dropped the chain guide for now but may build a 3mm spacer or triple washers, the clutch is so strong I'm not sure I need the chain guide. Im going to check a transmission stumpy at the specialized store with a caliper to validate, hard to accurate call 55mm vs 56 mm, seems closer to 56mm.

My micro adjust is at 7 and shifting feels great. I had previously ridden a couple rides using a 53.5mm chain line and it was good but wanted it optimal as I could get until a solid 0 degree, 55mm chainline, sram 3-bolt, flat top ring was available.

 

Running Xx-SL on my '22 stumpjumper s-works s4 w/ eewings, one-up 0 offset switch DM 32t (disclaimer, likely, slightly increased chain wear). This is verified via caliper of 55mm chainline, I drop the chain guide for now but may build a 3mm spacer or triple washers, the clutch is so strong I'm not sure I need the chain guide.

My micro adjust is at 7 and shifting feels great. I had previously ridden a couple rides using a 53.5mm chainline and it was good but wanted it optimal as I could get until a solid 0 degree, 55mm chainline, sram 3-bolt, flat top ring was available.

Why do you think the chain wear will be increased with the OneUp chainring?

 

I've been trying to set up a T-type on a mullet Stumpjumper S3 with a Hunt wheelset. I was lucky enough to have help from SRAM's folk during Crankworx at Whistler and they also weren't able to set it up properly. We think it might be a case of the cassette sitting too much toward the outer side such that not even with the micro-adjustment on position 14 I can get the chain to sit properly in its corresponding cog. Has anyone else experienced something similar?

 

What’s the axle width and is it in spec? Should be 148 mm for Boost. Make sure you have the proper endcaps.

 

2021 SWORKS SJ S5
XXSL 34T Chainring
Micro adjust is at 3

I had the going from 3rd to 2nd in the bike stand and out on the trail today. It did it one time and seem to sort itself out. Other than that the system has been great.

I've had most of the digital systems
DI2 - Fastest and smoothest of all just not under load
Sram force road - Solid system all the way around
Sram AXS - Good in all areas but not as smooth or as fast as DI2 and crunchy under load as well
Sram transmission - Smooth under load and in general, fast response is a moot point the way it's designed to shift.

 

Just got a new stumpjumper and transmission XO drivetrain and eewings plus a Praxis 0 offset ring for a 55 chainlink and it all works fine but I can feel the cage moving when going over roots and rough terrain plus a constant rattling sound that might be the chain? Not sure yet. It's making the new bike hard to want to ride. Had my shop guy, who I trust, go over it and he talked to SRAM tech guy and improved the cage movement just slightly but the rattling noise is almost constant on a trail ride. Anyone have this issue?