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X-Sync X-SYNC 1X chainrings from SRAM ensure maximum performance and durability. The long SRAM X-SYNC tooth edges grip the chain earlier than traditional triangular teeth. The sharp and narrow tooth profile as well as the rounded bevelled edges support the chain guide. To provide the best possible performance even in muddy terrain, the X-SYNC chainrings have recesses to remove dirt and mud from the inner chain links and rollers. Manufactured in Germany, the X-SYNC chainrings are an important part of SRAM's 1X drive.