Arm Material – Open Core Technology™ Aluminum. Stiffer, stronger and lightweight beyond any solid forged crankset.

Chainring – CNC machined 7075, two-tone anodized X-SYNC™.

GXP® Bottom Bracket – GXP’s Gutter Seal design cuts friction and weight—improving both feel and performance.

1x Chainring – X-SYNC™ CNC Machined

Bolt Circle Diameter – 94 mm

Recommended Groupset – SRAM 11-Speed

Recommended Chain – PC-X1

Pedal Spindle – 9/16"

BB Included – No

X-SYNC™ – SRAM X-SYNC™ 1X chain rings provide the highest level of performance and durability. The SRAM X-SYNC™ tall square teeth edges engage the chain earlier than traditional triangle shaped teeth. The sharp and narrow tooth profile, as well as rounded chamfer edges, help manage a deflected chain. To provide the best possible performance in muddy conditions, the X-SYNC™ chain rings have been designed with mud-clearing recesses for the inner chain links and rollers. Engineered in Germany, X-SYNC™ rings are an integral part of the SRAM 1X™ drivetrain.

OCT (Open Core Technology)™ – To fabricate Open Core Technology a single mass of premium alloy is pushed, pulled and squeezed into a hollow crank arm. During SRAM's exclusive process the magic happens, producing supreme strength while remaining weight-conscious. SRAM may have not been the first to fabricate hollow crank arms, but they are the best by yielding the highest stiffness-to-weight ratio out there. OCT cranks are stiffer, stronger, and lightweight beyond any solid forged crankset.