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1 inch "BMX Size" Headsets

BMX Standard Dimensions
(Most bicycles with one-piece cranks, including most older U.S. made bikes)

See also our page of Parts for American Bicycles

Cup outside diameterCrown race inside diameterThread sizeStem diameter
32.7 mm 26.4 1" x 24 tpi.833" / 21.15 mm

Headsets from Quality Bicycle Products

See also Sheldon Brown's Headset Crib Sheet

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