I put PR3 on my 2012 R1200R front and rear. 5,000 miles later I need to go on a 2,000 mile trip. The rear is not going to make it so I ordered a PR2 last night. I will put it on before leaving for the trip and see how many miles compared to the PR3.
I ran factory pressure 42 psi for a while (2,000 miles) then went down to 39 for handling reasons.
Only time will tell.
I only ride solo sometimes with 100 lbs of stuff including saddle bags.
PR3 is great on the front.
I like twisting the throttle, this is probably where the tire went