Chromag is the only MTB company officially authorised to produce chainrings with the X-SYNC technology. So now, no matter what kind of mountain bike you have, you can have the peace of mind that your chain will stay put. Technologies: SRAM X-SYNC™: 1x chainrings provide the highest level of performance & durability. The SRAM X-SYNC™ tall square teeth edges engage the chain earlier than traditional triangle shaped teeth. The sharp & narrow tooth profile, as well as rounded chamfer edges, helps manage a deflected chain. To provide the best possible performance in muddy conditions, the X-SYNC™ chainrings have been designed with mud-clearing recesses for the inner chain links & rollers. Engineered in Germany, X-SYNC™ rings are an integral part of the SRAM 1x™ drivetrain.