3DPBB Real Bushing Design (Milling Needed)

This is First 16'inch FDM Balance Bike which works in real.

3DPBB (3D Printed Balance Bike)
(Thingiverse link) https://www.thingiverse.com/thing:1107529

This is a milling(Laser or CNC) part for 3DPBB (3D Printed Balance Bike).
HOWEVER, YOU CAN PRINT IT OUT.

It is needed for real wheel assembly.