I've given some thought to a more aggressive tire for my Walker mower to replace the Turf-Saver style it came with because of a couple spots on my berm where they tend to slip. But reading post like this one I noticed some guys reported the gains by a tire with bar-type or a more aggressive style tread to allow more grip climbing hills, also can tear up a yard when turning. There must be a reason most tractors and XT's deliver with turf savers.. Now I am thinking maybe a bigger turf saver or a wider turf saver would be a better choice.