My stupid question for the day: Is that gap between the Lexon dustcap and your bearing just there to show the bearing and plastic ring in place? Also, you need the pinchbolts loose when you tighten down the top cap to pretension the bearings. But you probably know that. I also thought carbon steerers need to be cut higher, so the pinch bolts align with the compression sleeve inside.

I just received my frame yesterday but my Lexon bar is still awaiting a flight from China so I'm thinking this through myself.

I'm not sure that 1 mm more space will be enough. How much clearance is considered to be safe?

Many people don't have problems here, even with 46T chainrings, but my case is different, which is strange. This is my first build, may be I did something wrong, but I don't understand what exactly. I would be very grateful if someone could tell me. I put a 1 mm spacer on the shaft between a nut that holds a power meter and a bottom bracket. The bottom bracket model is Token BB47V24, installed without any spacers.

The chain doesn't go here. It's the left side of the chainring if you look from the drive side.

Now I see it. I thought I was looking at the downtube clearance when it's the chainstay instead.