not exactly sure what your on about
but thiner wheel = less grip = more sliding = less flipping
right?
pluss good luck flipping a car at all unless you hit something..
get some decent tread on your tyres and then get suspension, no need to get super wide tyres, as decent "thin" tyres (like 185) will do just a good a job in most cases.
of course the wider the tyre the more grip available, but for instance a crap wide tyre will have less grip than a decent "not so wide" tyre, you know what i mean...