Slice through wind. Drop the watts. 5DEV Aero 8-Bolt Chainrings for Road and Gravel turn every pedal stroke into clean, efficient speed. Precision-CNC&';d in San Diego from premium 7075-T6 aluminum, these rings feature a low-drag aero face for smoother airflow and quieter miles. Built for speed on tarmac and stability on washboard, 5DEV Aero Chainrings help you hold momentum longer and ride farther, faster. Aero-sculpted outer face cuts turbulence and improves airflow Shark Fin Tech reduces chain noise on 1x Mullet builds with MTB cassettes 7mm Offset Designed for road and gravel cyclists in the pursuit of speed For Use With: SRAM Transmission, XLPR, AXS, and SRAM Eagle Chains (May not work with certain Shimano Chains) *Please note that the Aero design may not work with outboard T47 BB&';s and is specifically designed to work with 5DEV internal cup T47 BB s or SRAM DUB Bottom Bracket Cups. Item Specifications Color Black Defined Color Black Direct Mount Type Direct Mount SRAM 8-Bolt Drivetrain Speeds 12 Material Aluminum Offset 7 Round or Oval Round Tooth Count 42 Weight 128 5DEV Aero Direct Mount Chainring Direct Mount Chainrings UPC: 850058721729