I've been using V-rated(or higher) for more than the last 300,000miles. I just went back to OEM 14inch from 15. The very day I had them put on just for front, my area got down-pour. Contrary to some reviews I read on these tires, they stick--solid response even in deep rain. I was impressed. Both steering and braking responses are great, also. Much to my delight, driving characteristics in the dry is excellent, including panic stops. Have to get 2 more for the rear. Will get another set of 15's. Ah, the only thing is I wish non-directional of the same caliber of tires are produced. Glad I tried them. I do play with pressure to suit my driving habit. Of course, handling response is just a tad slower than 195/50 or 195/55-15 I'm used to. Still, these Sumitomo HTR's are very solid, yet provides supple ride. Impressive!!!