Box Two 4-Bolt Chainring (Black) (39T) - BX-CR144B39T-BK
Box Two 4-Bolt Chainring (Black) (39T) - BX-CR144B39T-BK, Made from 7075 aluminum alloy, Cosine Chainrings are round and true. Features: Durable hard anodized finish Specs: Tooth Count39 Ring Position/TypeSingle Drivetrain SpeedsSingle Speed 3/32" Chainring BCD104 ColorBlack Defined ColorBlack MaterialAluminum