Imran, How was the cornering in your car before you upgraded the tires? Why i am asking this is whether FIAT changed the springs to reduce the body roll in 2012 cars, may be we should meet over weekend to TD and understand this better. Mine is 2010 car with same old springs but new dampeners and there is body roll when taken to corners,but I also feel Michelin soft rubber make it more noticeable. I am on god gievn air not on nitrogen but when the tires start loosing air at around 31 PSI , i can feel like I am driving my wagon R again!! but up it to 33 PSI it is stable and with good ride and cornering. Take it o 34PSI then starts bumpy rides at speeds less than 40 kmph.So i am sticking 33 PSI and it is working fine for me. May be FIAT can't offer a touch softer springs due to to class leading GC of 185 mm.