Xsync 2 came out with the 12 speed drivetrain and 50 tooth cog, so 30 was deemed by SRAM to be small enough. I run a 28 ring with a 42 tooth cog which would be equivalent to a 33 (theoretical) ring and 50 cog. There were also issues with the wear on the Xsync 1 11sp rings so SRAM changed the design with the stated intent of improving that. IDK how much of an improvement these are. Mounting is the same.

Anyway, you can get narrow-wide direct mount 12 speed rings smaller than 30T from other manufacturers like Wolftooth, Absolute Black, etc... and these work well.

 

Hey, tnx for the information.

But, considering 28T x-sync can be had for 16€, and second cheapest is absolute black for 50€.. That is more than three times more expensive.

Do you think it is still worth it?

 

You're have a 12 speed drivetrain, right? The SRAM steel 28 tooth ring is an 11 speed ring. The inner width of 11 and 12 speed chains is the same so I'm almost certain it will work with a 12 speed chain, though I haven't tried it. The WT and AB rings say they'll work with both.

I run a SRAM 28t steel ring on my 11 speed drivetrain. It's super smooth.

 

Yes ,gx eagle. I will probably order it and report back how it goes, tnx.

 

I kn it's been awhile but how did it go?

 

My Kona came with GX Eagle 12spd with a 34T x-sync2. Due to lots of issues with sucking up debris, I recently changed over to 11spd and went with Shimano Der/Shifter. I put on a SRAM GX 11spd cassette (have XD hub), 11spd chain and replaced the 34T x-sync2 chainring with a 30T. Everything shifts great.

I was set on 30T so I was looking at x-sync (steel) vs x-sync2 (alu). If you look closely, the tooth profile is very different on the x-sync2 with kind of a shark tooth angle to the teeth. The x-sync is more of a traditional tooth profile. Supposedly, the x-sync2 is less susceptible to chain drops. I stayed with the x-sync2 because after over 2,500 miles of singletrack I've never had a chain drop.

 

Tooth profile between the two is different, but regarding operation, I cant comment. I do suspect that xsync would also work on 12 speed.

 

It does work, since the inner width of 11 and 12spd chains is the same as it was mentioned above.
I've been using 12spd chains with a 11spd X-sync "1" rings for about ~3 years now, zero issues.

 

I am using an older sram crank with my new axs 12 speed drivetrain. It works as good or better than enything I have ever used. It is x sync 32 tooth chain ring. Quiet as a church mouse with the 12 speed chain.

 

Is that the road flattop chain with the xsync 11 speed chainring? The road xsync rings looks exactly like the Xsync2 and supposedly play well with eagle chains so they are compatible also?