widder tires better?

i am trying to figure out the rims that im gonnna get ive been looking at gettin 18x9.5 y2k cobra r (chrome) for my black 01 gt but have now began to wounder about wider tires in the rear... rather it helps or not. im going to have drag radials in the rear though for sure. i am also considering black 17x9.5 black bullits in front and 17x10.5 black bullits for the rear im stuck trying to figure out which combo i should go for
 
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