SRAM X Sync EX1 Sprocket Chainring for Bosch Motors 18T Straight Steel ModelNumber=20105 8 Color Black Rise 30 8 Color Black Rise 30 Weight 355 Material Alloy Width 800 Defined Color Black Back Sweep (deg) 27 Upsweep 27 Designed to face the worst British weather has to offer Hopes threaded bottom brackets feature high quality sealed cartridge bearings and fit a variety of cranksets desc li{list style:none 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