I want to change a 1 inch threaded fork to 1 inch threadless fork, but according to some tutorials on the internet, the process of removing and installing new cups looks a bit difficult and requires special tools.
Do I also really need to completely change the headset parts to make this conversion?
It appears that both have some parts in common, such as the cups and bearings. So I would keep those and only change the threaded race and nut.
My bicycle current headset looks something like this
But I also have an old headset that looks something like this
Context: I started assembling a new bicycle myself from used parts just as a hobby, so I am not worried about performance / cost. Also, the bike shops are all a couple hours drive from my house, so I want to avoid asking someone to do it for me
If you can share a few more considerations about changing forks, it would be appreciated.