Barchettaman, One of the nicer Cannondale paint designs, IMHO... show it as much as you want. I wish I could capture my '96's black gold in a photo.

embankmentlb, A 23C that works well is the GP3000 at 100 PSI, hopefully the GP4000 will work as well. It's large for it's size, 24ish. The Vredsteins TriComp work well also in 23C and it's closer to 23 at 120 PSI. I have 25C UltraSports on my 56 cm '89 CR, but I doubt a 28C will clear the chainstay and/or the brakestay maybe. Your 23C tires may also be large for their size, try them at 100 PSI.

Another thing to be considered is that these frames were handbuilt and can vary a wee bit so your brakestay may be a tad low compared to the previous or next frame built. I think that having dual pivot 600 calipers may also help just a little for tire clearance, primarily at the sides of the tire.

Brad

PS My turn for a gratuitus pic, that may show my brakestay clearance: