I have wanted a fixie conversion for some years and had planned to use a Gianni Motta frame with 120mm spacin. Got a cheap flip-flop wheel from Ebay and decided to make a studded fixie from a small Crescent 531 frame from 73 that I got for 10 dollars. Turned out OK and I made my first ever ride today. Scared in the downhills but riding on ice was just incredible. Smooth and quiet. Conditions on the fireroads were horrible with a little dry snow on top of refrozen slush. Had a couple of falls, I guess one gets better "fixiereflexes" after a few tumbles. All in all a much more enjoyable experience than I had thought.