SRAM X Sync EX1 Sprocket Chainring for Bosch Motors 18T Straight Steel ModelNumber=20105 Replacement microSHIFT thumb shifter mounts Replacement microSHIFT thumb shifter mounts allow you to replace broken units or convert microSHIFT bar end shifters to thumb lever mount for flat bar compatibility FSA bearings that set directly into the frame without the use of pressed in cups margin left: 25px Chainring BCD Direct Mount Bosch Color Black Defined Color Black Designed for ebike Yes Direct Mount Type Direct Mount Bosch Gen 2 Drivetrain Speeds 8 Drivetrain Speeds 9 Drivetrain Speeds 10 Drivetrain Speeds 11 Material Steel Ring Position Type Chain Retaining Single Ring Tooth Count 18