The Car Tire did lower my MPG by 1 as far as I can tell. As far as handling it is interesting but not bad. I can still lean the bike but it takes a little more handle bar input to keep it over in a long curve, and when you are ready to stand it back up it comes up a LOT easier. If there are deep ruts in the road from a lot of big trucks the back will move you into them before the front. Again just a different feel. Took me about 3 miles to get used to it.