SRAM's X-Sync 2 Eagle chainring in the 11.6218.030 series is the fully CNC-machined aluminum version — one step up from the cold forged rings that add roughly 10 grams, and a lighter alternative to the stamped steel variants aimed at durability over weight. If you're running a SRAM Eagle crank with the 3-bolt direct mount interface and want the CNC finish without stepping up to the XX SL Transmission ecosystem, this is the ring that drops onto GX, X01, and XX1 Eagle cranks.

The tooth profile is what SRAM calls the second-generation X-Sync design. Compared to the boxier original, these teeth are narrower to match the 12-speed Eagle chain and use a longer, positive-rake shape that grabs the chain earlier in the engagement cycle. The result is quieter running, better retention on chattery descents, and edge shaping that resists chain suck as the ring wears in. SRAM developed the profile after studying wear patterns on thousands of first-generation X-Sync rings, so the geometry is tuned to age predictably rather than degrade unevenly.

Offset matters here. The 3mm offset is the Boost version for 148mm rear spacing and a 52mm chainline, which covers the vast majority of modern trail and enduro frames. The 6mm offset is the non-Boost option for older 135/142mm frames running a 49mm chainline. Pick the wrong one and your chainline sits off, so double-check your frame spec before ordering. Tooth counts run from 30T through 38T depending on the SKU, giving room to gear down for steeper terrain or up for pedal-heavy XC and marathon riding.