Gen2/Steering Head

The steering head is the tube in the head position of the frame that mounts the fork steerer tube.

For 2014+ S and X-platform Zeros, the inner diameter of the steering head is 55mm for a steering tube size of 1in (25.4mm).

Steering head fastener stack (top to bottom)

1. Steering Stem Thin Nut (M27⨉1.5mm, 8mm depth); apply a 41mm hex socket.
2. Washer 41 - 27.5mm⌀, 2mm thickness (reportedly not present on 2018+ models)
3. Steering Stem Lock Nut (M30⨉1.5mm)
4. Bearing Lip Seal (55mm OD)
5. Steering Head Bearing (facing up)
6. Lower Triple Clamp Assembly Tube
7. Steering Head Bearing (facing down)
8. Bearing Lip Seal (55mm OD)