Sorry for a newbie question. I'm currently in the process of upgrading/updating my bike and I would like to replace the stock stem with threadless quill stem adapter , but I don't know which size should I buy.

This is my old stem. It's 22.2 in diameter. I think I have a 1'' threaded fork (not sure).



Replacement stem that I have - 28,6/25,4 mm fork diameter.



So should I buy the 25,4-28,6 (1'' to 1 1/8'') adapter or the 22.2-28.6 adapter?