Okay I have stock 16'' tires. They were worn out (all four) but I decided to get the front ones replaced a month ago. (195/50-16 ) The stock ones . So now I need to get both back tires, and my friend has two new 205/55/16 and since he is my best friend he is giving them to me fo 80 bucks for both. So I want tosee if its a problem having different size in the(dunno) back that in the front. I usually just go on the freeway and on the streets I dont race or anything if this matter. What do you recomend? Or should I pay 200 to get the back tires stock ones? 195/50-16 ? thanks