1-1-8" Double-Sealed Bicycle Headset Bearing- 30.5x41.8x8mm, 45/451 1 8" Bicycle Headset Bearing 45 45 Angle 30. 5 x 41. 8 x 8mm Double Sealed Angular Contact This 1 1 8" angular contact headset bearing is designed for modern bicycle headsets requiring a 45 45 contact angle. Built from durable chrome steel and sealed on both sides, it offers smooth steering, solid support, and resistance to moisture and debris whether you're racing, commuting, or hitting the trails. Inner diameter: 30. 5mm (ID may measure approx.
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