Stapfam, I seem to remember that too but it was in relation to sand as I recall. The wider tire floated over it easier and the rear didn't matter if it dragged its way through as long as it stayed behind the front end.

Around here the Shore guys use 26 fronts with around 2.35 to 2.5 inch and on the rear they like to go with 24's mouting 3.0 to 3.5 if they can shoehorn them into the rear frame area without rubbing. But they do it more for the impact absorbing on the bumps and only partly to lay back the steering angle for a little more stability when shooting down A line at Whistler (think of this as like falling off a mountain but riding a bike while doing so.... )