FSA Pro Track Chainrings are CNC Machined AL7075/T6 with laser-etched logos. Requires 1/2"x1/8" chain. Item Specifications: Ring Position/Type: Single, Tooth Count: 49, Drivetrain Speeds: Single Speed 1/2" x 1/8", Chainring BCD: 144, Color: Black, Defined Color: Black,
