Internal Headsets

Otherwise known as semi-integrated headsets, these headsets fit inside the head tube but include push-in cups.

Pro Headset Lower ZS44/30
+
1260
!

Cartridge headset lower, internal (semi-integrated) to suit 44mm frame inside diameter and 30mm fork crown race seat diameter.

Pro now supply their headsets in separate uppers and lowers in order to simplify compatibility with tapered headsets, forks etc. Shipping Weight: 103g.

Pro Headset Upper ZS44/28.6
+
1256
!

Cartridge headset upper, internal (otherwise known as semi integrated or Zero-Stack) to suit 44mm frame inside diameter and fork steerer tube diameter of 28.6mm. (1-1/8" fork)

Pro now supply their headsets in separate uppers and lowers in order to simplify compatibility with tapered headtubes, forks etc. Shipping Weight: 100g.