This is a stupid question probably but I figured I'd ask. My girlfriend has a Schwinn or Giant? womens bike with a threaded headset. I got her a fork and would like to put this on and I know you need a threadless headset. Not a big deal. I'm just wondering a 1" and a 1 1/8" headset press into the same diameter headtube, just the bearings are a hair larger correct? I'd like to get her some whatever headset and the correct stem/bars for her. Any help would be great!