What are the widest tires/wheels that can be put on the B13 all around? I've got 195/50/15's right now and I've seen others with 205/50/15's. Also, for the street, are Kumho 712's about the best tires for the price, handling, mileage, and everything else? Does it matter which rating it is? I've seen some in H, V, and W.