Please check precise measurements against the below to determine the correct size.
SPECIFICATIONS
STEERER DIAMETER: 1-1/2"
OUTER DIAMETER: 46.9mm
INNER DIAMETER: 32.8mm
HEIGHT: 7mm
CHAMFER ANGLES: 45°/45°
Uses chrome steel balls and races
Used in Giant OD2 lower headset assemblies. Black Bearing equivalent is bearing C7
