We've seen some posts by early adopters reporting various problems with Sram Transmission parts. This thread invites everybody to share their negative experiences with Sram Transmission components in one spot and how the issue was addressed.
Got Sram Transmission? Got problems? Post here.
lefthanded
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2,075 Posts
Where is the extended microadjust range? I updated the firmware, and it's still only 1-14. And I'm seriously considering warrantying the derailleur, because I'm already at 14, and the damn thing STILL has some slight problems downshifting roughly at 7->6->5 cogs. Something happened too, because a while ago (I still barely rode with the new Transmission setup) it worked "reasonably" at position 12.
I think I should have bought X0. I guess GX is junk, irrelevant how expensive it is in this groupset.
I think I should have bought X0. I guess GX is junk, irrelevant how expensive it is in this groupset.
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19,151 Posts
You seem to have a lot of buyers remorse.
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7,871 Posts
If you’re transporting the bike by car the rear derailleur is awake. I’ve never seen just how much battery drain this causes but it’s a non zero amount.
When I first got SRAM AXS I made a point of testing how long and how many shifts the rear derailleur battery would last whilst riding for each warning light colour:
I didn’t go through the process of driving the bike round and round in the car until the derailleur battery died though. It would be interesting to know but take a while.
If I’m taking the bike in the car somewhere to ride I make sure the AXS battery is fully charged the night before, and then usually charge it up again post ride when I get home too. The danger with taking the battery off the bike to transport it is forgetting to take the battery and then having no gears at all!
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7,871 Posts
The GX T Type rear derailleur gets different firmware to the XX SL, XX and X0 T Type derailleurs for some reason.
It will be a separate firmware release. They’re sure to bring the update to the GX T Type rear derailleur as that’s the version that’s had the most issues.
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7,871 Posts
The official SRAM claim for AXS shifter battery life is several years.
The longest that I’ve ever actually had MTB AXS shifter CR2032 batteries last on my bike in practice is 5 to 6 months though.
If the battery is close to dead after less than 10km riding there’s something else going on.
Not all CR2032 batteries are equal. There are lots of poor quality, often fake, CR2032 batteries out there. If they’re super cheap that’s a bad sign as the voltage can be too low from new. For bike use (shifters, power meters, sensors etc) I’d try some different brand name ones, bought from a reputable source. Energiser or Duracell for example.
If you pop open the shifter battery compartment, remove the battery and look inside there are two metal contacts that press against the battery. You can very carefully bend these up and outwards, so that they press harder against the battery. These contacts can sometimes be too light a touch on the battery to get a good connection so making them tighter can help. It can also stop the battery moving slightly inside the compartment on rough ground.
There have been issues with SRAM AXS shifters not going fully to sleep in the past as well. If the shifter stays awake it can drain the battery quickly. The test for that is to take the CR2032 battery out whilst the bike is stored, put it in just for riding and then note how the battery life is affected. If the battery lasts well past 10km riding like that, but doesn’t if left in the shifter, that can be a sign it’s not going to sleep. Make sure you’ve got the latest firmware for the shifter installed as well.
My pod also indicated low on the app after about 120km .. 2 - 3 weeks. Lets see how this fresh battery goes..
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2,075 Posts
Why did I get the update if it's not applicable to my derailleur then? That makes no damn sense!The GX T Type rear derailleur gets different firmware to the XX SL, XX and X0 T Type derailleurs for some reason.
It will be a separate firmware release. They’re sure to bring the update to the GX T Type rear derailleur as that’s the version that’s had the most issues.
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156 Posts
Even if you did, the update adds further micro adjust inboard not outboard.
If you were at 1 then your new micro adjust becomes 4, so you can go more inboard now
If you’re at 14 it will make absolutely no difference.
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7,871 Posts
What firmware version is your rear derailleur on now? It will tell you when connected to the SRAM AXS app.
SRAM | AXS
According to the SRAM web page the latest firmware for a GX T Type (RD-GX-E-B1) is 2.46.8 whilst the firmware that adds the extra micro adjust is 2.47.2 which is only for the XX SL, XX and X0 T Type rear derailleurs.
The GX T Type had the same firmware as the other T Type derailleurs at 2.43.2 but then it was different between 2.46.5 (most of the mtb rear derailleurs) and 2.46.8 (GX T Type). It looks like it will be a separate firmware for this micro adjust change too:
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7,871 Posts
The more new derailleurs come out the more complicated it gets for keeping track of SRAM firmware updates!Yup, 2.46.8 it is (and 2.46.2 Pod).
I guess it updated other stuff. I wish they published meaningful release notes, but most companies are guilty of this
I’d have thought there will be a similar firmware update for the GX T Type rear derailleur very soon.
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2,075 Posts
Screw this GX junk. Whenever I find X0 derailleur for acceptable price, this thing is flying back on warranty claim.
I thought it was good because it was expensive, and X0 being excessively expensive, I concluded GX was good enough. Wrong.
Two GX cassettes being junk straight out of the box, and now this. It also shifted its crappines around. Up until recently (and it's hardly been ridden 100km at this point) it just shifted weirdly on a few of the smaller cogs, and microadjust position 12 was just about ok where I only heard a very slight rubbing and it mostly shifted ok. Two rides ago it consistently refused to downshift around gear 9 and up. Changing microdjust to 14 kind of fixed it, but the rubbing was a little bit more audible. Yesterday it started occasionally and randomly skipping gears (as in suddenly jumping on another for a fragment of a second and then back), all the while somewhat refusing to downshift on the damn gears 9, 10 and 11.
I redid the setup about 500 fucking times and went through the process with SRAM support several times, so I'm pretty sure it's the derailleur. I'm also on X0 cassette now that's perfectly straight.
I thought it was good because it was expensive, and X0 being excessively expensive, I concluded GX was good enough. Wrong.
Two GX cassettes being junk straight out of the box, and now this. It also shifted its crappines around. Up until recently (and it's hardly been ridden 100km at this point) it just shifted weirdly on a few of the smaller cogs, and microadjust position 12 was just about ok where I only heard a very slight rubbing and it mostly shifted ok. Two rides ago it consistently refused to downshift around gear 9 and up. Changing microdjust to 14 kind of fixed it, but the rubbing was a little bit more audible. Yesterday it started occasionally and randomly skipping gears (as in suddenly jumping on another for a fragment of a second and then back), all the while somewhat refusing to downshift on the damn gears 9, 10 and 11.
I redid the setup about 500 fucking times and went through the process with SRAM support several times, so I'm pretty sure it's the derailleur. I'm also on X0 cassette now that's perfectly straight.
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1,160 Posts
I suspect the price of gasoline would be prohibitive. One of my roadtrip destinations is a 7 hour drive from home. Once at base camp, drives to the trailheads range from 30-45 minutes each way. If you add it all up, four days of riding includes about nineteen hours in the back of my truck. When I get home, the battery always shows green. For me, battery drain while the bike is being transported is not a concern.
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2,075 Posts
What the actual fcuk?....
When I use the chain calculator and pick my frame from the list (Propain Hugene, size M, 32t chainring /I use oval but does it matter?/), I get setup key B, 118 links, supports chainrings 32+34.
BUT if I manually enter 445mm chainstay length along with full suspension frame type and the same 32t chainring, the result actually says setup key A.
WTF?
What should I make of this?
What exactly does the setup key do to the derailleur anyway? I couldn't find this explained anywhere.
When I use the chain calculator and pick my frame from the list (Propain Hugene, size M, 32t chainring /I use oval but does it matter?/), I get setup key B, 118 links, supports chainrings 32+34.
BUT if I manually enter 445mm chainstay length along with full suspension frame type and the same 32t chainring, the result actually says setup key A.
WTF?
What should I make of this?
What exactly does the setup key do to the derailleur anyway? I couldn't find this explained anywhere.
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2,075 Posts
Uh, and only now have I noticed a small print under the calculator's result when I pick the brand and model:
This bike requires rear derailleur setup in SAG position.
Nowhere in the manual does it say WTF does "SAG position" mean.
I'm starting to get frustrated here...
This bike requires rear derailleur setup in SAG position.
Nowhere in the manual does it say WTF does "SAG position" mean.
I'm starting to get frustrated here...
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