2.5 back doesn't matter for swing weight. Think about it, your heel piece always ways much more than toe, your body weight is behind your boot midsole, etc., so from -1.5 to -2 I would say. I guess center wouldn't be too bad on these like it is on many park skis, though, do they have equal tip and tail rocker? I fondled a pair and now want to try them(but I can just use my LL2s in park when I want a rockered ski and PCs when I don't, so I won't buy them.)