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In West Newton Since 1952 - On The Web Since 1995
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ISO One Inch Threaded Headsets
| This is the size used on most high quality bicycles manufactured before the late 1990s. See also Sheldon Brown's Headset Crib Sheet ISO Standard Dimensions: | |||||
|---|---|---|---|---|---|
| Cup outside diameter | Crown race inside diameter | Thread size | Stem diameter | ||
| 30.2 mm | 26.4 | 1" x 24 tpi | 7/8" / 22.2 mm | ||
