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A few SRAM AXS Questions

Old 04-11-21, 11:46 AM
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A few SRAM AXS Questions

Hey everyone -

So I recently hit "purchase" on a 2021 Santa Cruz Stigmata - super, super pumped. My first ever big bike purchase. I love the look of the frame and the company, but I'm not super thrilled on the build options (Santa Cruz is definitely overpriced). I ended up getting the Rival1 build for $3500 - I don't think $6000 is a defendable price for the Force AXS build. I do however like the idea of electronic shifting / having a wider range than what the Rival offers. I plan on riding the bike as-is for a while (whenever I actually get my hands on it...) but potentially upgrading to AXS in the future. SRAM just release the GX Eagle AXS group recently and it seems like that RD is compatible with Force AXS shifters. I do have a few questions though:
  1. So if I bought that RD + the shifters and a cassette, would I be able to just switch out my chainring with an AXS compatible chainring? Or would I need a whole new crankset? The Stigmata comes with an Easton EA90 CINCH crankset.
  2. Also, do I have to run the SRAM flat top chain? Or can I run a KMC 12 speed?
  3. It appears to me that the Eagle 10-50 cassette is XD compatible - the wheels that come with my Stigmata are XD - would this just be plug and play then?
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Old 04-11-21, 12:50 PM
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Originally Posted by speedyspaghetti
Hey everyone -

So I recently hit "purchase" on a 2021 Santa Cruz Stigmata - super, super pumped. My first ever big bike purchase. I love the look of the frame and the company, but I'm not super thrilled on the build options (Santa Cruz is definitely overpriced). I ended up getting the Rival1 build for $3500 - I don't think $6000 is a defendable price for the Force AXS build. I do however like the idea of electronic shifting / having a wider range than what the Rival offers. I plan on riding the bike as-is for a while (whenever I actually get my hands on it...) but potentially upgrading to AXS in the future. SRAM just release the GX Eagle AXS group recently and it seems like that RD is compatible with Force AXS shifters. I do have a few questions though:
  1. So if I bought that RD + the shifters and a cassette, would I be able to just switch out my chainring with an AXS compatible chainring? Or would I need a whole new crankset? The Stigmata comes with an Easton EA90 CINCH crankset.
  2. Also, do I have to run the SRAM flat top chain? Or can I run a KMC 12 speed?
  3. It appears to me that the Eagle 10-50 cassette is XD compatible - the wheels that come with my Stigmata are XD - would this just be plug and play then?
I have a Canyon Grail that’s equipped with SRAM AXS, its very sweet. I also have a Salsa that came equipped with Rival1, however I just converted it to a 12 speed rear.
To answer your questions: The chainring that comes on your Rival1 build is also compatible with the AXS drivetrain, no need to change it. I don’t know the answer to the chain question. As you suspect, the Eagle cassette is XD compatible and will be “plug and play” with your Stigmata wheels.

If you’re interested in my Eagle 1x12 dropbar drivetrain (which is not Bluetooth) you can read about it in this thread

Good luck.
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Old 04-11-21, 01:00 PM
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Originally Posted by sarhog
I have a Canyon Grail that’s equipped with SRAM AXS, its very sweet. I also have a Salsa that came equipped with Rival1, however I just converted it to a 12 speed rear.
To answer your questions: The chainring that comes on your Rival1 build is also compatible with the AXS drivetrain, no need to change it. I don’t know the answer to the chain question. As you suspect, the Eagle cassette is XD compatible and will be “plug and play” with your Stigmata wheels.

If you’re interested in my Eagle 1x12 dropbar drivetrain (which is not Bluetooth) you can read about it in this thread

Good luck.
Oh wow, thanks for the awesome response!

Love the DIY 12 speed - very ingenious.

So it seems to me then that all I would need is the GX RD, Force eTap shifters (I can find the left one easily, but it seems like the right one is out of stock everywhere - how does that make sense?), a cassette, chain, and I'm good to go then! Should be under $1k I think which is way better than the $6k for the build from them (albeit with other upgrades) and I'll recover some of the cost by selling the Rival RD and shifters.
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Old 04-11-21, 01:49 PM
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Originally Posted by speedyspaghetti
Oh wow, thanks for the awesome response!

Love the DIY 12 speed - very ingenious.

So it seems to me then that all I would need is the GX RD, Force eTap shifters (I can find the left one easily, but it seems like the right one is out of stock everywhere - how does that make sense?), a cassette, chain, and I'm good to go then! Should be under $1k I think which is way better than the $6k for the build from them (albeit with other upgrades) and I'll recover some of the cost by selling the Rival RD and shifters.
Give a call to Competitive Cyclist about the right shifter; dunno what your brake situation is, but they had the hydro shift/caliper combo in stock last week despite not being listed on the website.

Eagle AXS does not use the flattop chain, but I’m not sure if the Eagle 12spd chain is replaceable with KMC 12spd.
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Old 04-12-21, 05:24 PM
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Originally Posted by chaadster
Give a call to Competitive Cyclist about the right shifter; dunno what your brake situation is, but they had the hydro shift/caliper combo in stock last week despite not being listed on the website.

Eagle AXS does not use the flattop chain, but I’m not sure if the Eagle 12spd chain is replaceable with KMC 12spd.
Will do - thanks.

So follow up question then - I kind of want to have this bike replace both my current gravel bike and road bike (cheap Chinese frame with Ultegra 2x10) so I planned on running two different wheelsets. In the road "configuration," I'd probably want something smaller than the 10-50 Eagle cassette, would I be able to run a different SRAM 12 speed cassette with the Eagle GX AXS RD + Force AXS shifters if I just swap out the chain too? Or would that be inadvisable?
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Old 04-12-21, 06:59 PM
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Originally Posted by speedyspaghetti
Will do - thanks.

So follow up question then - I kind of want to have this bike replace both my current gravel bike and road bike (cheap Chinese frame with Ultegra 2x10) so I planned on running two different wheelsets. In the road "configuration," I'd probably want something smaller than the 10-50 Eagle cassette, would I be able to run a different SRAM 12 speed cassette with the Eagle GX AXS RD + Force AXS shifters if I just swap out the chain too? Or would that be inadvisable?
I replaced my road bike with my Canyon Grail AXS. I don’t know the answer to your “multiple cassette” question, but if it were me, I’d mount some slicks to the wheels that come on the bike and try it on the road. You might find that the 10-50 is suitable. Especially if you can fit a 42T chainring up front.
I ride mine on B pace group rides (with 32mm road slicks) and haven’t found it wanting.
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Old 04-19-21, 11:19 AM
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Originally Posted by sarhog
I replaced my road bike with my Canyon Grail AXS. I don’t know the answer to your “multiple cassette” question, but if it were me, I’d mount some slicks to the wheels that come on the bike and try it on the road. You might find that the 10-50 is suitable. Especially if you can fit a 42T chainring up front.
I ride mine on B pace group rides (with 32mm road slicks) and haven’t found it wanting.
Which 32 tires are you running? It seems like the smallest tire I could use on the specific rim that comes with the bike is 32mm so I'll have to shop around for that size.
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Old 04-19-21, 01:47 PM
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I do not think you can run a SRAM AXS road cassette (i.e. 10-36 or 10-30) with the MTB rear derailleur.
​The 10-50 cassette will still give you the same top-end on the road, it just comes with bigger gear jumps and more of a weight penalty.

For 32mm road tires, my favorite are Conti GP5000 TL's. Rene Herse Stampede also looks like an excellent choice. Either would be fine keeping up with the fastest of road groups.
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Old 04-19-21, 02:07 PM
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Originally Posted by speedyspaghetti
Which 32 tires are you running? It seems like the smallest tire I could use on the specific rim that comes with the bike is 32mm so I'll have to shop around for that size.
Teravail Ramparts.
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Old 04-22-21, 07:08 AM
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Originally Posted by msu2001la
I do not think you can run a SRAM AXS road cassette (i.e. 10-36 or 10-30) with the MTB rear derailleur.
​The 10-50 cassette will still give you the same top-end on the road, it just comes with bigger gear jumps and more of a weight penalty.

For 32mm road tires, my favorite are Conti GP5000 TL's. Rene Herse Stampede also looks like an excellent choice. Either would be fine keeping up with the fastest of road groups.
This. An eagle derailleur won't work well with a cassette smaller than around 40t. I hear rotor makes a 12 speed 11-39 cassette that "may" work ok with an eagle derailleur, but it's also HG. To run a smaller cassette you need a road AXS RD and a flat top chain. Also a smaller (road) SRAM cassette will require an XDR free hub
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