Hey,
I got a reply from Joy from LC with this diagram:
For your reference, the original LCR018-D headset interface with our HBR17 integrated handlebar system is as follows:
Upper headset interface: Inner diameter 52.1mm, depth 8.7mm
Fork steerer: Standard OD1 diameter 28.6mm
I found the technical Deda Superbox V2 manualwith the dimensions. See picture 2.
I feel like it should work. However, I do not understand the 8.8+-0,3 mm dimension on the Deda manual. What does it refer too? Looks like the top cover?
Will try to ask both Deda and LC for confirmation too.
Thanks