IS27

Integrated Headset for Cr-Mo headtube

Integrated headset specially designed for use in Cr-Mo frames

Eliminates the need to have the headtube machined allows for custom height to be determined by the frame builder.

CNC machined light alloy top cover and compression ring, and Cr-Mo cups

Tange Seiki original sized 4T5 Cartridge Bearing upper

Fully Sealed Mechanism


Technical Information


  Material   Height Information
Top Cover A6061-T6 Light Alloy 7.1mm ID 28.8mm / Pre-assembled Seal rings for water proof
Compression ring A6061-T6 Light Alloy 6.0mm ID 28.6mm
Upper Adapter Cup SUC415 Steel 10.2mm OD 40mm Cr-Mo Head tube for welding
Lower Adapter Cup SUC415 Steel 14.5mm OD 40mm Cr-Mo Head tube for welding
Crown Cone SS41 Steel 4.1mm Insertion 30.0 +0 -0.1
Cartridge Bearing x 2 SUJ2 Steel #1508 41/30.2/6.3
Lower Seal Ring Nylon Plastic 0.7mm  
Head Tube Cr-Mo tube     OD 40 ID 38.2 any length