ACB 4545 1125 BO- 1-1/8 Black-Oxide treated Angular Contact Headset Bearing (30.5mm x 41.8mm x 6.5mm: 45x45 deg) AK Enduro provides a three year

Enduro provides a three year anti-corrosion guarantee

The deep-groove design raceways allow for maximum sized Grade 5 Silicon Nitride ceramic balls for increased contact area and improved performance and longevity

36 x 45 deg) -

This ceramic-hybrid radial bottom bracket bearing features black oxide-treated 52100 high-carbon chromium alloy races

ACB 4545 1125 BO- 1-1/8 Black-Oxide treated Angular Contact Headset Bearing (30.5mm x 41.8mm x 6.5mm: 45x45 deg) AK Enduro provides a three yearACB 4545 1125 BO 1 1 8 Black Oxide Angular Contact Headset bearing (30. 5mm x 41. 8mm x 6. 5mm: 45x45 deg) Angular contact headset bearing featuring anti corrosion Black oxide Magnetite treated 52100 High Carbon Chromium alloy races paired with grade 10 Balls. Black Oxide treatment provides an extra level of corrosion resistance and extended worry free performance This size bearing is also known in the bike Industry by these part numbers: MR042 870E