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
First F-974EW 1" Threaded Headset EC30 26.4 Crown Race