Hardcore headset for extreme riders! For use with tapered zerostack headtube and tapered 1 1/8 inch to 1.5 inch fork steerer.

Features:

• Internal headset for tapered head tube and 1 1/8 to 1.5 inch tapered fork
• Upper: 36/ 45 degree ACB (Blue seal)
• Lower: 1.5 inch 36/45 degree ACB (Black seal)
• For tapered 50mm/61mm OD headtube
• Forged alloy upper cup with CNC machined alloy lower cup
• Stack Height: 18.8 + 2.4 = 21.2mm
• Weight: 110.2g

Upper ZS44/28.6, Lower ZS55/40Spares:

• Upper Bearing: 160-6460
• Lower Bearing: 160-6470
• Crown Race: H6078

Occasionally, without notice, manufacturers change product design and/or specifications.