I am buying some 17 X 7.5 rota actions and was wandering about the size of tires to get. I no that 225/45/17 are the stock size sti tires and will fit the rotas but i was kindof wanting to go wider. They make some 235/40/17 and that is probably the width i want but i dont want to low profile because i think that makes the car look ricey . I know that there is some equation to figure out the tire side wall side in relation to the width of the tire. But i don't know what it is and also i was wondering if those two tire sizes would have the same size or comparable size side walls. Thanks.