SRAM Cring XX1 11spd X-Sync 38TSRAM X Sync 1x chain rings provide the highest level of performance and durability. The SRAM X Sync tall square teeth edges engage the chain earlier than traditional triangle shaped teeth. The sharp and narrow tooth profile, as well as rounded chamfer edges, help manage a deflected chain. To provide the best possible performance in muddy conditions, the X Sync chain rings have been designed with mud clearing recesses for the inner chain links and