Hello,
You will need:
Stock pro/ultra pro headset
Threadless headset top cap
All you have to do is replace threaded top cap of the threaded headset with the threadless top cap of a threadless headset.
Now you can ride with threadless forks and any compression system you want.
I just saved some of you like 30 bucks, if you don't mind riding stock headsets, cause i rode many threadless headsets and i personally don't care.
You will need:
Stock pro/ultra pro headset
Threadless headset top cap
All you have to do is replace threaded top cap of the threaded headset with the threadless top cap of a threadless headset.
Now you can ride with threadless forks and any compression system you want.
I just saved some of you like 30 bucks, if you don't mind riding stock headsets, cause i rode many threadless headsets and i personally don't care.