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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 chaining. Building on the original x-sync's renowned chain retention ability, the X-Sync 12-speed direct mount chain ring 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 chain ring 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 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.