front & back size differential

[factman]

they do do it for handling purposes but i think mainly for traction. the front wheels dont have 400+ hp trying to brake traction on them and to prove it look at the american Dodge Viper. huge V10 motor in the front but the tires are 305 in the front and 335 in the back so that the tires wont brake loose from all the hp's it has. those are just my 2 cents on the matter. i think spring rate and sway bars have more to do with cornering then anything.