Enduro Bearings ACB 3645 BO CC 1-1/8 30.2x41x6.5mm

Angular-contact headset bearing featuring anti-corrosion Black oxide/Magnetite treated alloy races. Black Oxide treatment provides an extra level of corrosion resistance and extended worry-free performance. A perfect headset bearing for those looking for an affordable option without compromising on durability and reliability. 

This size bearings also known in the bike Industry by these part numbers: 
27287-1046-004 
HSS0130K 
TH-873E 
MR-122 

The Enduro line of angular-contact headset bearings start with Black Oxide treated Chromium Steel races and then steps up to full 440C stainless steel. The Black Oxide headset bearings are treated in multiple chemical baths to achieve a 3 micron anti corrosive depth. This process also provides a secondary advantage of heat treatment making them tougher. The BO races then go through a secondary "super grind” polishing the rolling surface mirror smooth. Both Stainless and BO bearings are engineered with the largest balls possible, feature dual-lip seals riding in a micro-groove (labyrinth) and are filled 90% with extra high pressure Almagard 3752 grease for the ultimate protection against sweat and the elements. Enduro Angular Contact (A/C) bearings are designed so all balls are evenly engaged to spread the force over a larger surface area, minimizing wear and maximizing life. 

Dimensions (Inner x Outer x Width: Angle): 
30.2mm x 41mm x 6.5mm: 36x45 deg 

Can’t find the size you’re looking for? Get in touch – we can often order bearings with short delivery times, sometimes within just a couple of days.