Designed for use with a 104 BCD interface of any 104 BCD spider This chainring utilizes SRAM’s T-TYPE design and is backwards compatible with Eagle technology (X-SYNC II). SRAM drivetrain engineers optimized this ring to combat the high-torque high-wear situations e-bike riders face. The aggressive tooth design provides better chain retention for a smoother more efficient pedal feel with a focus on long wear-life.