So I bought a 2001 Tcr with the aero downtube on it off ebay thinking that it HAD to have a 1/1'8th inch headtube on there so i could swap over my EC70 fork. Well it appears it doesnt but not sure. The crappy giant fork it came with has a 1in but the integrated headset seems to have to much lip on the inside so I am wodering if giant speced these bikes witha deevolution headset or something? My ec70 can easialy slide inside the headtube of this bike its just the bearings that came with the headset are to small? Can I buy a regular 1'8th headset and have it fit? Thanks for any help. If not I guess I'll have to use their fork for now and just get a shim for my stem.