SRAM X-Sync Chainring 42 Teeth 110mm BCD Polished Grey/Matte Black Fits 10 and 11 Speed SRAM ChainsSRAM X Sync chainrings feature tall teeth with alternating tooth profiles that hold the chain amazingly well and still provide space for mud to clear. 73g Full CNC AL rings Item Specifications Chainring BCD 110 Color Silver Black Defined Color Silver Drivetrain Speeds 10 Drivetrain Speeds 11 Ring Position Type Chain Retaining Single Ring Tooth Count 42 SRAM X Sync Chainring Chainring UPC: 710845750618