Ritchey Headset Comp Logic PF Tap. 1 1/8-1.5 ZS44/40 55/40

Technical specifications
Headset part:Set
Headset size:1 1/8? – 1 1/2?
Integration method:Press fit (Semi integrated)
Head tube outer diameter upper:50 mm
Head tube outer diameter lower:61 mm
Head tube inner diameter upper:44 mm
Head tube inner diameter lower:55 mm
Steerer tube diameter upper:28.6 mm
Steerer tube diameter lower:38.1 mm
Material:Steel