I 3D printed my tires using 40D FLEX material.
However, they ended up getting stuck on the screws due to the tight tolerance.
To fix this issue, I modified the cylinder part of the screw by reducing its diameter to 9.7mm. Now, the screws fit perfectly with the FLEX/TPU tires.
I would like to express my gratitude to rorys3D for providing the Little Pit Stop models.
The author remixed this model.