SRAM Force AXS 2X12 107BCD Chainring You are looking at a 4-bolt chainring with a 107 BCD designed for SRAM Force AXS 2x12 drivetrains. The aluminum chainrings with a durable finishfeature X-Range gearing technology which gives you more range and a smoother gear progression. Features X-Range gearing technology - Increased range and a smoother gear progression Improved tooth profiles that are designed to improve wear and shifting performance Outer Chainrings which sport a durable finsih Bolt Center Diamter: 107 BCDAvailable colors: Blast Black or Polar Gret Available sizes: 33, 35, 46, 48T | Sram | Force Axs 2X12 107Bcd Chainring | Blast Black | 33T, 12 Spd, 107Bcd, Use With 46T | Aluminum