Procraft SI Pro 4450 Headset ZS44/28.6 | ZS44/30

Semi-integrated Ahead headset for steerer inside Ø 44mm / outside Ø 50mm. The bearing is mounted with a shell full in the head tube. Height: 12.9mm. Cap, shell and cone: aluminium, angular contact ball bearing (industrial standard).

Ahead-headset building classes:
Ahead-headsets are divided into the "classical" building class, the semi integrated "Press Fit" and the full integrated "Drop In" headsets. The "classical" version has a bearing which is located outside the steerer tube. "Press Fit" and "Drop In" headset bearings are located inside the steerer tube which results in a lower stack height. In contrast to "Press Fit" headsets "Drop In" headsets don't have to be pressed in. The bearing rests directly on the angled (36° or 45°) surface of the steerer tube. The most common "Drop In" versions are called "Drop In Campy" for Campagnolo Hiddensets and "Cane Creek".
For more detailed information please contact our service team.
Material: cap, shell and conus: aluminum
Weight supplement: manufacturer information