Does anyone ride fixed 20c? I have a chance to get two free, nice 700x20c rims, tires and tubes and I wanted to know if it was worth throwing a track hub on the rear and riding those. I ride 27 1/4" on my fixed and 700x23c on my road bike with no problems at all. Also keep in mind that I'm 5'6 135-40 lbs, if that changes anything.