I stored my mirror since it broke very soon and it was well built apart from the screw for the handle bar. Some call it planned obsolescence. And thus, here we are with the solution!

My handle bar is a Spank Spike 800 Race Bar with 18mm inner diameter.

I've used DIN 24014 M6 1.0 pitch 45mm lenght bolt and M6 nut.

I only had to print inner bolt and inner male nut and worked.
I'll change the outer part in order to tighten with two screws instead of the hole left in this assbly.

creality

No

Yes

200

20

MATERIAL
PLA doesn´t work for this purpose.

PRINTING NOTES
It must be printed laid down for twist resistance. Attached gcode for CR10-V3

MOUNTING INSTRUCTIONS
You have to tighten these two with a nut outside the assembly and when it is tight, unscrew the nut and mount the mirror in place. Finally screw and tighten the mirror to the inserted part.