The Helmets RE-71 Potenza are coming to the end of their life. They are great tires. I wish I would had had a chance to do a track day with them. On the Dragon before last, they stuck like glue. Its tempting to buy another set, but they are very loud. Because of my hearing I can not use a tire that loud in daly use. So I have to find something different. I know we give a lot of tire advice here but I am going to do something a little different. It has 215/40 18's I am thinking about going to a 17 rim but keep the tire hight the same. This will add about an inch in sidewall. The roads here are very bad and I am tired of me and the suspension of the Helmet being beat to death. By adding some sidewall I am hoping to add some buffer. So what size would do this and what is a great performance tire that is quiet.