Ritchey Wcs Headset Cartridge Bearing: 51.9/40/8Mm 45°/45°

Genuine cartridge Ti-coated bearing for Ritchey WCS headset.
45° angular contact bearing
Titanium coated for corrosion resistance

46.0/34.1/7mm 45°/45°,
46.9/34.1/7mm 45°/45°,
51.9/40.0/8mm 45°/45°