I ran Metzlers on my R1100S but didn't like the way they wore. I tried
PR 2's and was impressed with not only the mileage I got out of them but they wore very evenly. When those wore out I tried
PR 3's. I really like the
PR 2's better and also got around 1000 more miles out of them than the
PR 3's. I just put a
PR 2 on the front again and will add a
PR 2 to the rear in the spring. Maybe when those are wore out, I'll try the
PR 4's.