You can find all the accessories you need at Escapa.
Xlc AP-C03 headset for 1 1/8" carbon forks
Headset extension for 1 1/8" forks with carbon steerer tube
For inner diameter 22.0–23.4 mm (without washer)
For inner diameter 23.4–25.0 mm (with spacer)
Clamp height: 40 mm
Secures the carbon tube from the inside to hold the stem in place without damaging the material
