Let's get basic here. The equation for the circumfrance of a circle is 2*pi*r. The larger diameter tires will incrase gearing and cause your speedo to read low. I think the change to 195/70-14 is a large one - figure it out, but probably around 10% - that's a lot. Going to 70 series will also reduce your steering response. Is appearance that important to you? I'd stay stock. Grant