I have put a couple hundred miles on the PR4s and I like them. It has been all riding back and forth to work as conditions at home don't allow much other riding at this time. One day was raining so I got to try them in wet conditions. I think they are at least as good as the PR3s on dry roads and better in the rain. They are quieter and I think smoother. On a side note I had 90 degree valve stems installed with Doran pressure sensors screwed on externally and they are holding air pressure much longer before dropping. Three weeks and have dropped two pounds. As I am not an agressive rider I will be interested in what others think of them in the mountains. I will also be interested to see if I get better milage with the GT on the back as I had 12,700 on my PR3s. I would like to thank those who reported that going to a 55 on the back made for better handling as it has made a world of difference.
