SRAM

X0/X9 Alloy 2x10-Speed Chainring, 120BCD x 39t GXP

7075-T6 aluminum construction with a blast-black anodized finish treatment and CNC/laser detailing for 10-speed drivetrains (X.0 level)

• Thick-taper outer ring specific to SRAM cranks and employ a threaded tab for direct-mount chainring bolts (outer chainrings specific to GXP or BB30 cranks: separate chainrings for Cannondale or Specialized applications) 
• Middle/outer rings employ perfect-timed shift pins and ramps for precise shifting 
• Designed for 26/39t, 28/42t, or 22/33/44t combinations (do not use alternate configurations with available sizes)