Jason from Huntsville, AL on 11/17/2006 12:59:32 PM:
I agree that the surface is not all that great. I rode the 290 miles on the trail with 700x28 tires and had 10-12 times when I almost went down due to the surface. There are lots of leaves, twigs, sticks, rocks, walnuts, etc that make it tough riding in some places. I am an experienced rider and would not recommend anything smaller than a 28cc tire. I would also make sure to get a tire with a Kevlar belt and a puncture resistant tube. I have no flats only because of good tires and tubes. Good luck and have fun!