How much interference is there generally between a headset and headtube?
Reason I'm asking is that I ended up with a Ti bike that has a funky 1-1/4 headtube. It measures about 36mm I.D. and all the 1.25" headsets and 1.25->.1.125" headset spacers seem to measure about 37mm on the O.D. I tried turning down the spacers to 36.5mm and it's still too much difference. How much press-fit should there be? Certainly .020" is a lot, which is likely why it doesn't seem to want to go, but is a .005" press fit too little interference, is .010" too much?? I really have no idea how much difference there should be nor what amount headset mfgr's normally use.
Any insight or advice is appreciated.
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