I'm riding on 8" wheels, and I've encountered the same problem... shifting weight back to lighten up the front end definitely helps, the front wheel doesn't seem to get as squirrelly that way, LOL. I'm dying to see what a difference these dune-riding wheels I set up will make in soft sand, I'm hoping they will ofer an improvement over the knobbies... I prefer the knobbies on hard dirt and berms, but I feel that they lose performance in deep sand, regardless of speed. Hopefully these X Trac tires will work better in the deep stuff, I don't care about being the fastest bike in the dunes this winter, but I'd like to have more control and not have to ride so loosely, 10-4??? We shall soon see whether the aggro tread pattern on the X Tracs makes any appreciable difference in deep sand: I intend to share the results of my experiment at several websites, especially if the tires make a big difference.