AXS Transmission se...
 

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AXS Transmission setup key

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Anyone had one disappear? 

 

Gears have been working well for a while, but went to shit today. Just a case of torquing everything back up. 

But whilst trying to go through the correct procedure, noticed my setup key has gone. 

They don't seem too readily available either when searching Google. Ordered one from Lordgun

 

20250907_123631.jpg

 
Posted : 07/09/2025 12:03 pm
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What is a setup key?

 
Posted : 08/09/2025 6:02 am
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It’s a flippable chip in the mech cage that slightly alters the mech dynamics depending upon suspension kinematics.

 
Posted : 08/09/2025 6:16 am
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Posted by: DickBarton

What is a setup key?

 

What Pauly said (I think, maybe) and it also holds the mech in certain positions when setting everything up - goes where that black hole is in my pic

 

 
Posted : 08/09/2025 6:57 am
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Ah...sounds rather handy...I didn't know the t-type stuff had that.

 
Posted : 08/09/2025 7:05 am
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ooh, it's also the "clutch"/lock mechanism that holds the cage down for taking the wheel off. Bit mad that it can just fall out!

Did you switch it from A to B (or viceversa) and not click it back in properly, maybe?

 
Posted : 08/09/2025 7:37 am
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Posted by: desperatebicycle

Did you switch it from A to B (or viceversa) and not click it back in properly, maybe?

 

I remember making sure it was in the correct position for the bike AND clicking it in some months ago. All of a sudden it's gone. Who knows mate, I'll have a good fiddle when I fit the new one

 
Posted : 08/09/2025 7:46 am
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Guess, the fact they sell spares...

Hopefully the battery won't fall off, I never trusted in that little clip completely... They do do a cage for it too.. so maybe that says something! 

And if you ever go on an uplift, make sure the straps aren't in contact with the shifter. Wears the battery down prrrretty quick that. :S

 
Posted : 08/09/2025 7:59 am
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@desperatebicycle I don’t think the cage lock is related to the set-up key.

Also, if you’re travelling with your bike for any length of time make sure you remove the AXS battery as they’re motion sensitive.

 
Posted : 08/09/2025 3:51 pm
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Posted by: Pauly

I don’t think the cage lock is related to the set-up key.

The cage lock and setup key are the same thing.

Just used in a different position.

 

It doesn't alter the mechs dynamics either.

Just changes the position when you're setting the mech up for chain length.

 

The mech will run perfectly fine without the setup key*

*As long as it was set up correctly to start with and hasn't moved.

 

 

 
Posted : 08/09/2025 4:40 pm
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Posted by: TheArtistFormerlyKnownAsSTR

Just a case of torquing everything back up. 

I note SRAM increased the torque specified, possibly this is why

Some of our first production models include a bolt marked with a 25nm torque specification. However, as we continued testing, we found that 35nm helped the Transmission have a lower probability of losing chain tension. This is not a safety concern, and the bolt is otherwise the same, follow the updated torque specification of 35nm for best performance.

 
Posted : 08/09/2025 5:10 pm
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Posted by: Pauly

if you’re travelling with your bike for any length of time make sure you remove the AXS battery as they’re motion sensitive.

No wonder my battery wore out after a few runs! Didn't know that and the bike was in the back of the car for an hour...  Funny thing though, at the point my battery wore out there was a chap on a Vitus sat right next to me and he had AXS... lent me his battery to shift into a decent gear and I could carry on with the day 🙂

It won't happen again though, cos I have installed the everlasting-battery version in it's place 😀

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Posted : 09/09/2025 7:51 am
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Nice linking there STforum!

 
Posted : 09/09/2025 7:52 am
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My bad @singlespeedstu

 
Posted : 09/09/2025 5:22 pm
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@desperatebicycle I found out the hard way too!

 
Posted : 09/09/2025 5:24 pm
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Posted by: Rubber_Buccaneer

Posted by: TheArtistFormerlyKnownAsSTR

Just a case of torquing everything back up. 

I note SRAM increased the torque specified, possibly this is why

Some of our first production models include a bolt marked with a 25nm torque specification. However, as we continued testing, we found that 35nm helped the Transmission have a lower probability of losing chain tension. This is not a safety concern, and the bolt is otherwise the same, follow the updated torque specification of 35nm for best performance.

 

Inthink that sram statement needs correcting. It should say now customers have finished testing the, for us we have found out the bolt isn’t tight enough. We would like to thank our customers for providing a free testing service to catch the things we missed in development

 

 
Posted : 10/09/2025 10:30 am

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