First Components F-974EW 1" ISO THREADED HEADSET • An economical 1in threaded ISO headset to fit classic/vintage bikes with a ø30.2mm ID headtube and a ø26.4mm crown race (not compatible with JIS fork/headtube) • Steel cups & hardware with ball retainer ball bearings • EC30/25.4 – EC30/26 • Stack Height: 34.0 mm
