Please check precise measurements against the below to determine the correct size.
SPECIFICATIONS
STEERER DIAMETER: 1-1/2"
OUTER DIAMETER: 51.8mm
INNER DIAMETER: 40mm
HEIGHT: 8mm
CHAMFER ANGLES: 36°/45°
TH-073E
Chrome steel balls and races
TH-073S
Stainless balls and races
TH-073R
Alloy outer race, chrome steel balls and inner race
Also known as part code MR-127. Black Bearing equivalent is bearing D1
