CEMA bearings are comprised of G5 rated Si3N4 Ceramic balls bearings, with high polished steel bearing races to ABEC7/ISOP4 standard.
These bearings use high-quality barium-hydrocarbon grease.
17287: Onyx Ultra HG 15mm internal driver bearings (x1),
6804: Onyx Ultra HG Bolt-up rear nondrive side hub shell (x1)
6805: Onyx 20mm front hub shell (x2), Onyx Pro HG rear behind the driver (x1)
6806: Onyx Ultra HG behind the driver (x1)
6902: Onyx HG bolt-up Internal driver bearing (x1)