Originally Posted by
maddmaxx
A couple of inches off the seatpost (not carbon.....do not cut that) will be fine. Most cyclocross frames seem to ride bigger than the stated size. The most critical measurement is the top tube virtual length. That may be too long for her and there isn't much you can do except use a shorter stem.
You can cut a carbon steerer and not a carbon seatpost? Done it many times, no problem. A good deal on a frame that does not fit is money wasted. I would sell the bike and get one that is correctly sized.