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X-Sync 2 Eagle 12-Speed Direct Mount Chainring - Boost

5 out of 5 stars
1 Review
Current price: $85.60 - $101.65 Original price: $107.00
Up to 20% off

Style & Size:


Why We Like The X-Sync 2 Eagle 12-Speed Direct Mount Chainring

After putting SRAM's OG X-Sync chainring through its paces and confirming its ridiculously good chain management properties, we're excited to see SRAM's next generation X-Sync 2 arrive on the scene. Designed to pair with SRAM's groundbreaking one-by 12-speed Eagle drivetrain, the X-Sync 12-Speed Direct Mount Boost Chainring changes things up with claims of improved durability and even better chain control. As with the original design, each tooth is CNC-machined to support the chain's inner- and outer-link widths, providing a variable thickness from tooth to tooth so the chain and chainring effectively lock together as you pedal while also clearing mud and other debris with ease.

The major departure in design lies in the tooth shape. Where the original X-Sync teeth took on a boxy shape, X-Sync 2 is narrower to accommodate the 12-speed Eagle chain and features teeth that more closely resemble those of a shark. Boasting aggressive profiling, these teeth hold the chain securely in place like, well, like a shark's tooth digging into something. The key difference being, of course, that the Eagle chain is designed to accommodate the ring's teeth, while chances are good that a real shark's teeth will cause some pretty—err—dire compatibility issues with whatever they happen to get a hold of.

The benefits of this new profile aren't just limited to its chain retention ability or providing an opportunity for us to write gratuitously about sharks. It mimics the wear profile seen in the original X-Sync teeth for increased durability, and it also features edge shaping to help prevent chain suck over time. The direct-mount interface also makes swapping rings a breeze, giving quick flexibility to adapt to different shapes of terrain.


  • Integrates with SRAM's groundbreaking 12-speed Eagle drivetrain
  • 3mm offset for ideal chainline with Boost hubs
  • Updated tooth profile provides confident chain retention
  • Direct-mount interface makes changing rings a snap
  • Item #SRM00AI
Number of Rings
30t, 32t, 34t, 36t, 38t
Compatible Components
SRAM XX1 Eagle, SRAM X01 Eagle, SRAM 12-speed drivetrains
Claimed Weight
[34T] 2.9oz (81g)
mountain biking
Manufacturer Warranty
2 years

Overall Rating

5 based on 1 ratings

Review Summary

1 Stars - 0 reviews
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4 Stars - 0 reviews
5 Stars - 1 reviews

Fits True To Size

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5 out of 5 stars

February 3, 2021

Nice addition

I've used it several times
Size Bought:
30 tooth
5' 10"

My old legs needed just a little more spin for those long sustained climbs and short technical sections so I replaced the stock 32 tooth ring with this fancier machined 30 tooth one. The difference is definitely appreciated and I don’t feel like it’s too low to be useful. Using more of the smaller cogs in back now too so sprockets should last a little longer. Classier look with the gold logos and sharper definition.

user image
matt D