Tires really are kind of a science. I will try to give you as many answers to your questions as I can... First of all, you need to know that better or worse handling all depends on contact patch. That is the amount of rubber that you have on the road. Obviously the more rubber you can put on the road (the bigger the contact patch), the better your car will handle. As for bigger contact patch in the rear - well, Mustangs have an inherent problem called understeer. Understeer is basically when your front tires lose adhesion to the road before the rear tires do and you get a car that pushes through the corners. By running a smaller tire in front than the rear, you are only going to make this problem worse. Also, a 225-50 up front and a 245-50 out back means that your car would sit higher in the rear than in the front. That in itself would probably not be optimal for handling. YOu would have to run a 225-55 up front and a 245-50 in the rear for the tires to be the similar circumferences. I would have to advise to run 4 tires the same size if you want a better handling car... I run 245-50-16s on a 16x8 inch ROH rims and have no problems (well very minor problems) with rubbing on very tight corners (those rims have a perfect backspacing for that size of tire. The tires really fill the fenderwells nicely). I love that tire/wheel combo on my car and it handles great.
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Red '90 GT - My Daily Driver w/ Kenny Brown braces & Springs, 6 KYBs, Caster/Camber Plates, Factory Five Control arms, Poly Bushings, 3.55 gears, Hurst shifter, Dynomax cat-back, Cervini 2 1/2 cowl, & Polished ROH ZR6 wheels... Griggs torque-arm and panhard bar waiting for installation!
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