Product DescriptionFSA Hammer Threadless Headset. Headsets. ?For BMX / Freeride ?12mm "Deep Cup" designs ?Nylon top cover & plastic seal ?Forged and CNC machined steel cups ?Upper: 5/32"x20 caged ball bearings ?Lower: Oversized 3/16"x20B caged ball bearings ?Stack Height 12.3+11.9=24.2mm ?Size 1.1/8" ?We ....
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