<page_title> Headset (bicycle part) </page_title> <section_title> Fork dimensions </section_title> <table> <cell> 1.5" <col_header> Fork standard </col_header> </cell> <cell> 38.1 mm <col_header> Stem-clamp diameter (nominal) </col_header> </cell> </table>
1.5" (38.1 mm) is used in the OnePointFive Standard.