SRAM EX1 X-Sync 8-11 Speed Sprocket For Bosch Gen 2 Motors - Bosch Direct Mount - Round - Black - 14TBuilt with the needs of E Bike riders in mind, SRAM chainrings for Bosch motors incorporate the same secure X SYNC chain management technology found in every SRAM 1x drivetrain. Features: Compatible with Bosch Gen 4 motor driven E MTB and E Road bikes An integral component of the SRAM 1x drivetrain X SYNC tall, square tooth design provides maximum chain control Sharp, narrow tooth profile and rounded chamfer edges help manage a deflected chain 14 18T