Originally Posted by
Marcus_Ti
Hard packed dry rail-trails, with a minimum of rock, is better than many paved roads. Riding a roadie on that isn't that big a deal.
It is actual looser pack or wet....or deep peak gravel...or single track...or any number of more technical surfaces that put a stop to that.
The fire roads around here are pretty smooth, but it still seems like it would be too squirrelly on slicks. Plus, anything more than 6 or 7% grade you'd have to have your weight balanced just right. Again, just seems like too much trouble unless the terrain is flat and in excellent condition.