Hi everyone,

I'm currently using the Lexon Thin Line https://it.aliexpress.com/item/1005009076837103.html and there's one thing I don't fully understand.

From what I can see, the cables are routed internally but they actually pass through the spacers, not just the headset. Because of that, if I want to change the stack height for bike fit, it seems like I have to disconnect and redo all the cables every time.

This is where I'm confused: is this really how it's designed to work, or am I missing something in the setup?

I get the clean look and aero benefit, but from a usability point of view it feels like a big compromise. I wouldn't have designed it like this.

Anyone else using it? Is it basically a "set it once and never touch it again" system, or is there a smarter way to adjust it?

if the spacer opens sideways, you can adjust. If not, you need to re-cable.
On the listing, the spacers do look solid. More likely than not, they aren't. It would be aggressively retarded as a design choice.

Generally, people have sacrificed bike fit and usability for aesthetics. Especially if you use a bike shop for tweaks, it's becoming luxurious to ride a bike that fits you, because changing a stem can cost the price of car.

Yes it's a crap design but easily remedied. It's just a thin plastic divide which you can easily cut away (or at least enough for a hose to pass through) and file down to get it smooth. It won't impact the way the spacers interlock or fit.

The spacers have been designed by someone who has no clue about real life..

I used a  grinding tool to adjust the spacers so that you can take them off without re-routing the hoses.
It doesn't affect the stability of the spacers. And it's easily done.