I bought the frame below with a view to building a fixie with it. It didnt come with forks or a headset. It is a 653 frame with a headtube inside diameter of 30mm. So Im assuming I need to fit a 1 inch headset.
I had a brief look for some forks and it seems you can get a threadless steerer fork with an inch diameter and I've also seen threadless 1 inch headset. Do these work in the same way an inch and an eighth aheadset works? Is there a shim to fit a modern stem to the steerer?

