ford91mustang

i want to get 15x4.5 in the front and 15x8 or 10 in the back(which would be better?). i am told they can crack easily and am worried about spendin my $ on something that will break along the way and i no that u need to go slow on turns. Would i need to buy some spacing for the back because the width of the tires are bigger?

90mustang5.8

i got my 15 x 9's on the back and i like them alot, but when winter comes it sucks