SRAM Eagle T-Type E-MTB Bosch Chainring Teeth: 38 Speed: 12 BCD: Direct Mount Aluminum BlackEngingeered to interface with Bosch motor systems, SRAM drivetrain engineers optimized this ring to combat the high torque, high wear situations e bike riders face. The aggressive T Type tooth design provides better chain retention for a smoother, more efficient pedal feel with a focus on long wear life. Steel (36T,38T) Backwards compatible with other Eagle Technology SRAM Model ID: CR TTYP BO A1 TECH SPECS Speed 12 BCD Direct Mount Chainring Comp.