29'ers are the 700 wheel'd bikes, right? If so, I have a '96 Trek 730 hybrid that's a 29'er. Running 700 x 35 tires right now, it works great on everything but really wet and muddy trails. Oh, and I definitely did some sliding on a really sandy high-speed sweeper this last week, not scary or anything but some wider knobbies would have definitely stuck it out better. Personally, I find 29'ers to be better for most trails.