SRAM Bosch X-Sync 2 Steel Eagle Direct Mount Chainring - 38T Non-Boost BlackSRAM Bosch X Sync 2 Steel Eagle Direct Mount Chainring 38T Non Boost Black. The SRAM X SYNC 2 Eagle direct mount chainrings are built with the needs of E MTB riders in mind. They feature the same chain management technology for SRAM 1x drivetrains designed for Bosch motors. Sharp narrow tooth profile and rounded chamfer edges help manage a deflected chain Mud clearing recesses TECH SPECS Direct Mount Type Direct Mount Bosch Gen 4 Tooth Count 38