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Ships within 48 hours · Estimated delivery Sep 25 - Sep 30
Boost: 20mm
The Enduro line of headset bearings begin with chromium steel
radial bearing with 52100 High-Carbon Chromium alloy races paired with grade 10 balls
The double-row design greatly reduces flex in the BB spindle while doubling the bearing contact area
Enduro HS Bearing 1.375" 36.8 x 45.8 x 6.5 45x45° Variant:Enduro Headset Bearing 1.375inch ACB 4545 S8551 Black Oxide 36.8 x 45.8 x 6.5 mm 45x45deg S182500006 S172500014 Boost: 20mmACB 4545 S8551 BO 1 3 8" Angular Contact Black Oxide treated Headset bearing (36. 8mm x 45. 8mm x 6. 5mm: 45 x 45 deg) Angular contact headset bearing featuring anti corrosion Black Oxide Magnetite coated 52100 High Carbon Chromium alloy races paired with grade 10 Balls. Black Oxide coating 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:
