SRAM Eagle X-SYNC 2 SL Boost Chainring The X-Sync 2 chainring is a product of SRAM's drivetrain engineers studying the performance and wear on thousands of X-Sync chainrings. They subjected every size of chainring to environmental and mechanical tortures, abuse and neglect, in both real world and lab testing. They wanted to create a chainring that would improve the Eagle drivetrain's performance in all conditions. The new X-Sync 2 chainring provides increased chain retention, decreased friction, and reduced noise and wear. Features X-Sync 2 chainring design increases chain retention, wear life, and reduces friction and noise Forged and machined aluminum provides a strong and durable product SRAM direct mount design is clean and functional Available sizes: 30t, 32t, 34t, 36t, 38t Color:Grey Designed to be used with: SRAM Eagle 12-speed chains | Sram | Eagle X-Sync 2 Sl Boost Chainring Lunar | Grey | 30 Tooth, 3Mm Boost, C2 | Aluminum