Hi guys, quick question, I thought I have the solution but now I am doubting. In the pictures @wapkoen linked, the diametr of the caliber pivot is 12.8. then I found what they call a perfect caliber truck cad model and there the diameter is 12mm.
If someone has already caliber or TB trucks can please check the length of the pivot and the diameter? Thank you very much!

Cali II will fit in Cali and Cali II but not the other way around since Cali II is slightly shorter. TB218’s take the Caliber II and the dimensions are approximately .700" OD x .498 ID x .495" depth and .645" overall length

Thanks a lot! I will compare it with the model I made.
What do you mean with internal diameter?
I was referring to the metal part attached to the truck not the pivot cap.