It's no surprise that with the launch of its ground-breaking one-by 12-speed Eagle drivetrain, SRAM also introduces a reworking of its X-Sync chainrings. Building on the original X-Sync's renowned chain retention ability, the X-Sync 12-Speed Direct Mount Chainring changes things up with claims of even better chain control. As with the original design, each tooth is CNC-machined to support the chain's inner- and outer-link widths by providing a variable thickness from tooth-to-tooth, so the chain and chainring essentially lock together as you pedal and push away mud with ease. The 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 a megaton aquatic predator latching onto a precisely thrown oxygen tank, then let it to glide seamlessly back to the cassette for smooth, friction-free turns. The beauty of this new profile isn't just in its chain retention ability. It mimics the wear profile seen in the original X-Sync teeth for increased durability, and it features specific edge shaping to prevent chain suck over time. The direct-mount interface also makes swapping out rings a breeze, giving quick flexibility to adapt to different shapes of terrain.