SRAM X-Sync Chainring 44 Teeth 110mm BCD Polished Grey/Matte Black MFPN=11.6218.010.009 look for the serial number

look for the serial number inside the battery door

Cup Diameter 46mm BB Shell Width 83mm Crank Spindle Diameter 28

CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older Helmet Style Urban Maximum Head Circumference 63 Defined Color Black

Fully captured top cover - no loose parts

SRAM X-Sync Chainring 44 Teeth 110mm BCD Polished Grey/Matte Black MFPN=11.6218.010.009 look for the serial numberSRAM X Sync Chainring 44 Teeth 110mm BCD Polished Grey Matte Black. SRAM X Sync chainrings feature tall teeth with alternating tooth profiles that hold the chain amazingly well and still provide space for mud to clear. Full CNC AL rings TECH SPECS Tooth Count 44 Ring Position Type Chain Retaining Single Ring Drivetrain Speeds 10 Drivetrain Speeds 11 Chainring BCD 110 Color Silver Black Defined Color Silver Material Aluminum