I'm on the second set of PR4's and currently have 11,840 miles on the second set. i got 12,000 on the first set. My front has 2/32 of tread and the rear just under 1/32 remaining. It is apparent to me riding style, body weight, and selection of roads and speed have much to do with tire longevity. Not rocket science.
I recently returned from a 3200 miles ride through NV, UT, CO, NM, and AZ. With few exceptions the route(s) were US Hwy and State Hwy. There was a good deal of long upper elevation fairly straight empty highways where we routinely cruised at 80mph. I do not go into curves hot. I down shift prior to the lean and accelerate moderately through the turns. I do not trail brake unless caught going too fast . I routinely downshift and avoid braking when approaching stop signs and lights.
Final thought, when you get to my age you focus on living longer and riding more. Taking risk seems to diminish with age.
