Black Bearing headset bearings are machined and assembled to precise tolerances.
Please check precise measurements against the below to determine the correct size.
SPECIFICATIONS
STEERER DIAMETER: 1-3/8"
OUTER DIAMETER: 49mm
INNER DIAMETER: 37mm
HEIGHT: 6.5mm
CHAMFER ANGLES: 36°/45°
- Chrome steel balls SAE52100
- Chrome steel races SAE52100
- Premium quality grease
- Also referred to using the following part code: MR031