You guys got me to take the wheel off and try to eyeball the drop-out width with a transparent ruler, and lo and behold, it sure looks like 128mm to me. I will confirm with calipers when I buy some. My downtube shifters are index/friction switchable. So are you saying I can get any standard 130mm freehub wheel - get a new or used 6, 7, or 8 speed cassette (possibly need a spacer for the cassette?), drop it into the bike and go riding w/o other changes? I like that very much!