alright, so i got the stock rims 225 in the front, 235 in the rear. the rt-615's dont come in the 225 size. should I get 235/40 all around? is that a bad idea? I wont be able to fit 255/40 in the rear on stock rims, right? hmm, i want these tires, but maybe its not gonna work out with my stock rims. what do you guys think?

 

the 255/40 should fit, but honestly i would just put the 245/45 all around on your car. It would balance the car out, reducing understeer, possibly with mild oversteer. I really like those tires and should work out for you.

 

The 255 will fit the stock 18" wheels. I would go with 245 front and 255 rear, that way you keep the understeer bias that will keep the VDC happy. These are the best dry traction street tires out there. Just don't plan on driving when it's wet!

 

Considering that you drive a base (no TCS) the same tires all around will be fine.