A good quality ball bearing alloy and chrome steel headset in polished silver.

The French size has a 26.4mm crown race, which fits certain older Japanese bikes.

• S.H.I.S. Upper: EC30 / 25.0-1.0
• S.H.I.S. Lower: EC30 / 26
• Fork type: 1" French threaded

This ISO size has a 26.4mm crown race and fits most American, European, and newer Asian bikes.

• S.H.I.S. Upper: EC30 / 25.4-24tpi
• S.H.I.S. Lower: EC30 / 26
• Fork type: 1" English threaded

The JIS size has a 27mm crown race, which fits certain older Japanese bikes.

• S.H.I.S. Upper: EC29 / 25.4-24tpi
• S.H.I.S. Lower: EC29/ 27
• Fork type: 1" English threaded

41mm stack height.