SRAM's X1 Crankset takes a less-is-more approach to mountain biking shifting. Paired with SRAM's 1x11-speed parts (sold separately), you get the gearing of a double or triple drivetrain, with greater simplicity, less noise, and reduced weight. There's less clutter on your bars without a front shifter and cable, and dropped chains and chainguides are a distant memory thanks to the ingenious X-Sync chainring teeth that hold your chain. On top of all that, the cranks themselves are seriously light thanks to the forged aluminum arms and spider. Experience less with X1, because less is more.
SRAM's X-Sync technology ensures a perfect fit between the XX1 chainring and XX1-specific chain for unheard of chain stability with no slap, no drops and no chainguide or weight penalty!
BB30 is an oversize bottom bracket standard that boosts stiffness and decreases weight. BB30 bottom bracket bearings (sold separately) are pressed directly into compatible frames, meaning there are no heavy external cups to thread in. And, BB30 cranksets feature 30mm-diameter spindles (standard spindles are smaller) for greater pedaling efficiency and increased power transfer.