PARTS > Stems/Spacers/Headsets > BBB Headparts

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BBB TurnAround 1 1/8" 36 DEGREES ANGULAR CONTACT BEARING A bike exerts 2 kinds of forces: "Angular Contact Force" (ACF) and "Pressing Force" (PF). Efficient handling of these 2 forces are crucial to your headset's longevity and proper functioning BBB headsets use: 1. Angular Contact Bearings - Especially made to deal with ACF 2. 36 / 45 degree chamfers - Designed and proven to be the optimum angles depending on application, at handling PF